diff --git a/esp8266/modpyb.c b/esp8266/modpyb.c
index 49df418a2c..d40745b8fc 100644
--- a/esp8266/modpyb.c
+++ b/esp8266/modpyb.c
@@ -155,16 +155,7 @@ STATIC const mp_map_elem_t pyb_module_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_sync), (mp_obj_t)&pyb_sync_obj },
 };
 
-STATIC const mp_obj_dict_t pyb_module_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(pyb_module_globals_table),
-        .alloc = MP_ARRAY_SIZE(pyb_module_globals_table),
-        .table = (mp_map_elem_t*)pyb_module_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(pyb_module_globals, pyb_module_globals_table);
 
 const mp_obj_module_t pyb_module = {
     .base = { &mp_type_module },
diff --git a/extmod/modubinascii.c b/extmod/modubinascii.c
index 8cab7d6781..262d99bc31 100644
--- a/extmod/modubinascii.c
+++ b/extmod/modubinascii.c
@@ -68,16 +68,7 @@ STATIC const mp_map_elem_t mp_module_binascii_globals_table[] = {
 //    { MP_OBJ_NEW_QSTR(MP_QSTR_b2a_base64), (mp_obj_t)&mod_binascii_b2a_base64_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_binascii_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_binascii_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_binascii_globals_table),
-        .table = (mp_map_elem_t*)mp_module_binascii_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_binascii_globals, mp_module_binascii_globals_table);
 
 const mp_obj_module_t mp_module_ubinascii = {
     .base = { &mp_type_module },
diff --git a/extmod/moductypes.c b/extmod/moductypes.c
index dc3776f9a6..83cfbbcc57 100644
--- a/extmod/moductypes.c
+++ b/extmod/moductypes.c
@@ -649,16 +649,7 @@ STATIC const mp_map_elem_t mp_module_uctypes_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_ARRAY), MP_OBJ_NEW_SMALL_INT(TYPE2SMALLINT(ARRAY, AGG_TYPE_BITS)) },
 };
 
-STATIC const mp_obj_dict_t mp_module_uctypes_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_uctypes_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_uctypes_globals_table),
-        .table = (mp_map_elem_t*)mp_module_uctypes_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_uctypes_globals, mp_module_uctypes_globals_table);
 
 const mp_obj_module_t mp_module_uctypes = {
     .base = { &mp_type_module },
diff --git a/extmod/moduhashlib.c b/extmod/moduhashlib.c
index 8c6b34a4ca..1c2e76b042 100644
--- a/extmod/moduhashlib.c
+++ b/extmod/moduhashlib.c
@@ -105,16 +105,7 @@ STATIC const mp_map_elem_t mp_module_hashlib_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_sha256), (mp_obj_t)&sha256_type },
 };
 
-STATIC const mp_obj_dict_t mp_module_hashlib_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_hashlib_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_hashlib_globals_table),
-        .table = (mp_map_elem_t*)mp_module_hashlib_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_hashlib_globals, mp_module_hashlib_globals_table);
 
 const mp_obj_module_t mp_module_uhashlib = {
     .base = { &mp_type_module },
diff --git a/extmod/moduheapq.c b/extmod/moduheapq.c
index c2db3b6211..8c8cd8345f 100644
--- a/extmod/moduheapq.c
+++ b/extmod/moduheapq.c
@@ -118,16 +118,7 @@ STATIC const mp_map_elem_t mp_module_uheapq_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_heapify), (mp_obj_t)&mod_uheapq_heapify_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_uheapq_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_uheapq_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_uheapq_globals_table),
-        .table = (mp_map_elem_t*)mp_module_uheapq_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_uheapq_globals, mp_module_uheapq_globals_table);
 
 const mp_obj_module_t mp_module_uheapq = {
     .base = { &mp_type_module },
diff --git a/extmod/modujson.c b/extmod/modujson.c
index 4bfadf193e..f1a5eda629 100644
--- a/extmod/modujson.c
+++ b/extmod/modujson.c
@@ -259,16 +259,7 @@ STATIC const mp_map_elem_t mp_module_ujson_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_loads), (mp_obj_t)&mod_ujson_loads_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_ujson_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_ujson_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_ujson_globals_table),
-        .table = (mp_map_elem_t*)mp_module_ujson_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_ujson_globals, mp_module_ujson_globals_table);
 
 const mp_obj_module_t mp_module_ujson = {
     .base = { &mp_type_module },
diff --git a/extmod/modure.c b/extmod/modure.c
index deb3679475..eb010faf90 100644
--- a/extmod/modure.c
+++ b/extmod/modure.c
@@ -221,16 +221,7 @@ STATIC const mp_map_elem_t mp_module_re_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_DEBUG), MP_OBJ_NEW_SMALL_INT(FLAG_DEBUG) },
 };
 
-STATIC const mp_obj_dict_t mp_module_re_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_re_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_re_globals_table),
-        .table = (mp_map_elem_t*)mp_module_re_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_re_globals, mp_module_re_globals_table);
 
 const mp_obj_module_t mp_module_ure = {
     .base = { &mp_type_module },
diff --git a/extmod/moduzlib.c b/extmod/moduzlib.c
index 3659d518c9..751b064d37 100644
--- a/extmod/moduzlib.c
+++ b/extmod/moduzlib.c
@@ -87,16 +87,7 @@ STATIC const mp_map_elem_t mp_module_uzlib_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_decompress), (mp_obj_t)&mod_uzlib_decompress_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_uzlib_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_uzlib_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_uzlib_globals_table),
-        .table = (mp_map_elem_t*)mp_module_uzlib_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_uzlib_globals, mp_module_uzlib_globals_table);
 
 const mp_obj_module_t mp_module_uzlib = {
     .base = { &mp_type_module },
diff --git a/py/modarray.c b/py/modarray.c
index c0fe331643..360fe8a5f1 100644
--- a/py/modarray.c
+++ b/py/modarray.c
@@ -37,16 +37,7 @@ STATIC const mp_map_elem_t mp_module_array_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_array), (mp_obj_t)&mp_type_array },
 };
 
-STATIC const mp_obj_dict_t mp_module_array_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_array_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_array_globals_table),
-        .table = (mp_map_elem_t*)mp_module_array_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_array_globals, mp_module_array_globals_table);
 
 const mp_obj_module_t mp_module_array = {
     .base = { &mp_type_module },
diff --git a/py/modcmath.c b/py/modcmath.c
index a147a754b8..4cd3a82359 100644
--- a/py/modcmath.c
+++ b/py/modcmath.c
@@ -162,16 +162,7 @@ STATIC const mp_map_elem_t mp_module_cmath_globals_table[] = {
     //{ MP_OBJ_NEW_QSTR(MP_QSTR_isnan), (mp_obj_t)&mp_cmath_isnan_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_cmath_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_cmath_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_cmath_globals_table),
-        .table = (mp_map_elem_t*)mp_module_cmath_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_cmath_globals, mp_module_cmath_globals_table);
 
 const mp_obj_module_t mp_module_cmath = {
     .base = { &mp_type_module },
diff --git a/py/modcollections.c b/py/modcollections.c
index 5cd0b317a1..8035b72d59 100644
--- a/py/modcollections.c
+++ b/py/modcollections.c
@@ -37,16 +37,7 @@ STATIC const mp_map_elem_t mp_module_collections_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_namedtuple), (mp_obj_t)&mp_namedtuple_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_collections_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_collections_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_collections_globals_table),
-        .table = (mp_map_elem_t*)mp_module_collections_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_collections_globals, mp_module_collections_globals_table);
 
 const mp_obj_module_t mp_module_collections = {
     .base = { &mp_type_module },
diff --git a/py/modgc.c b/py/modgc.c
index a27ef7eed9..8c9be70688 100644
--- a/py/modgc.c
+++ b/py/modgc.c
@@ -100,16 +100,7 @@ STATIC const mp_map_elem_t mp_module_gc_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_mem_alloc), (mp_obj_t)&gc_mem_alloc_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_gc_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_gc_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_gc_globals_table),
-        .table = (mp_map_elem_t*)mp_module_gc_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_gc_globals, mp_module_gc_globals_table);
 
 const mp_obj_module_t mp_module_gc = {
     .base = { &mp_type_module },
diff --git a/py/modio.c b/py/modio.c
index ef3b29b53f..6a273b39b7 100644
--- a/py/modio.c
+++ b/py/modio.c
@@ -52,16 +52,7 @@ STATIC const mp_map_elem_t mp_module_io_globals_table[] = {
     #endif
 };
 
-STATIC const mp_obj_dict_t mp_module_io_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_io_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_io_globals_table),
-        .table = (mp_map_elem_t*)mp_module_io_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_io_globals, mp_module_io_globals_table);
 
 const mp_obj_module_t mp_module_io = {
     .base = { &mp_type_module },
diff --git a/py/modmath.c b/py/modmath.c
index 7124820041..0111dc5523 100644
--- a/py/modmath.c
+++ b/py/modmath.c
@@ -221,16 +221,7 @@ STATIC const mp_map_elem_t mp_module_math_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_lgamma), (mp_obj_t)&mp_math_lgamma_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_math_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_math_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_math_globals_table),
-        .table = (mp_map_elem_t*)mp_module_math_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_math_globals, mp_module_math_globals_table);
 
 const mp_obj_module_t mp_module_math = {
     .base = { &mp_type_module },
diff --git a/py/modmicropython.c b/py/modmicropython.c
index 87bab0a33e..b23758291d 100644
--- a/py/modmicropython.c
+++ b/py/modmicropython.c
@@ -67,16 +67,7 @@ STATIC const mp_map_elem_t mp_module_micropython_globals_table[] = {
 #endif
 };
 
-STATIC const mp_obj_dict_t mp_module_micropython_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_micropython_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_micropython_globals_table),
-        .table = (mp_map_elem_t*)mp_module_micropython_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_micropython_globals, mp_module_micropython_globals_table);
 
 const mp_obj_module_t mp_module_micropython = {
     .base = { &mp_type_module },
diff --git a/py/modstruct.c b/py/modstruct.c
index 8c0cafda07..f29c8c1f96 100644
--- a/py/modstruct.c
+++ b/py/modstruct.c
@@ -205,16 +205,7 @@ STATIC const mp_map_elem_t mp_module_struct_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_unpack), (mp_obj_t)&struct_unpack_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_struct_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_struct_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_struct_globals_table),
-        .table = (mp_map_elem_t*)mp_module_struct_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_struct_globals, mp_module_struct_globals_table);
 
 const mp_obj_module_t mp_module_struct = {
     .base = { &mp_type_module },
diff --git a/py/modsys.c b/py/modsys.c
index 8ef66af052..d9be7d1bc1 100644
--- a/py/modsys.c
+++ b/py/modsys.c
@@ -120,16 +120,7 @@ STATIC const mp_map_elem_t mp_module_sys_globals_table[] = {
 #endif
 };
 
-STATIC const mp_obj_dict_t mp_module_sys_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_sys_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_sys_globals_table),
-        .table = (mp_map_elem_t*)mp_module_sys_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_sys_globals, mp_module_sys_globals_table);
 
 const mp_obj_module_t mp_module_sys = {
     .base = { &mp_type_module },
diff --git a/py/obj.h b/py/obj.h
index 8a8a1eb211..febff67c29 100644
--- a/py/obj.h
+++ b/py/obj.h
@@ -106,8 +106,8 @@ typedef struct _mp_obj_base_t mp_obj_base_t;
         .map = { \
             .all_keys_are_qstrs = 1, \
             .table_is_fixed_array = 1, \
-            .used = sizeof(table_name) / sizeof(mp_map_elem_t), \
-            .alloc = sizeof(table_name) / sizeof(mp_map_elem_t), \
+            .used = MP_ARRAY_SIZE(table_name), \
+            .alloc = MP_ARRAY_SIZE(table_name), \
             .table = (mp_map_elem_t*)table_name, \
         }, \
     }
diff --git a/stmhal/make-stmconst.py b/stmhal/make-stmconst.py
index ba428395ce..03051c557e 100644
--- a/stmhal/make-stmconst.py
+++ b/stmhal/make-stmconst.py
@@ -145,23 +145,14 @@ STATIC const mp_map_elem_t stm_%s_globals_table[] = {
 
     print("""};
 
-STATIC const mp_obj_dict_t stm_%s_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = sizeof(stm_%s_globals_table) / sizeof(mp_map_elem_t),
-        .alloc = sizeof(stm_%s_globals_table) / sizeof(mp_map_elem_t),
-        .table = (mp_map_elem_t*)stm_%s_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(stm_%s_globals, stm_%s_globals_table);
 
 const mp_obj_module_t stm_%s_obj = {
     .base = { &mp_type_module },
     .name = MP_QSTR_%s,
     .globals = (mp_obj_dict_t*)&stm_%s_globals,
 };
-""" % (mod_name_lower, mod_name_lower, mod_name_lower, mod_name_lower, mod_name_lower, mod_name_upper, mod_name_lower))
+""" % (mod_name_lower, mod_name_lower, mod_name_lower, mod_name_upper, mod_name_lower))
 
 def main():
     cmd_parser = argparse.ArgumentParser(description='Extract ST constants from a C header file.')
diff --git a/stmhal/modnetwork.c b/stmhal/modnetwork.c
index c6723b182e..fd3fee9284 100644
--- a/stmhal/modnetwork.c
+++ b/stmhal/modnetwork.c
@@ -79,16 +79,7 @@ STATIC const mp_map_elem_t mp_module_network_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_route), (mp_obj_t)&network_route_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_network_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_network_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_network_globals_table),
-        .table = (mp_map_elem_t*)mp_module_network_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_network_globals, mp_module_network_globals_table);
 
 const mp_obj_module_t mp_module_network = {
     .base = { &mp_type_module },
diff --git a/stmhal/modpyb.c b/stmhal/modpyb.c
index d3ea797976..38c5499b0b 100644
--- a/stmhal/modpyb.c
+++ b/stmhal/modpyb.c
@@ -574,16 +574,7 @@ STATIC const mp_map_elem_t pyb_module_globals_table[] = {
 #endif
 };
 
-STATIC const mp_obj_dict_t pyb_module_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(pyb_module_globals_table),
-        .alloc = MP_ARRAY_SIZE(pyb_module_globals_table),
-        .table = (mp_map_elem_t*)pyb_module_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(pyb_module_globals, pyb_module_globals_table);
 
 const mp_obj_module_t pyb_module = {
     .base = { &mp_type_module },
diff --git a/stmhal/modstm.c b/stmhal/modstm.c
index 1196ff82ff..960476fa95 100644
--- a/stmhal/modstm.c
+++ b/stmhal/modstm.c
@@ -126,16 +126,7 @@ STATIC const mp_map_elem_t stm_module_globals_table[] = {
 #include "modstmconst.gen.c"
 };
 
-STATIC const mp_obj_dict_t stm_module_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(stm_module_globals_table),
-        .alloc = MP_ARRAY_SIZE(stm_module_globals_table),
-        .table = (mp_map_elem_t*)stm_module_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(stm_module_globals, stm_module_globals_table);
 
 const mp_obj_module_t stm_module = {
     .base = { &mp_type_module },
diff --git a/stmhal/moduos.c b/stmhal/moduos.c
index 95446cdb06..ad0913fae4 100644
--- a/stmhal/moduos.c
+++ b/stmhal/moduos.c
@@ -351,16 +351,7 @@ STATIC const mp_map_elem_t os_module_globals_table[] = {
 #endif
 };
 
-STATIC const mp_obj_dict_t os_module_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(os_module_globals_table),
-        .alloc = MP_ARRAY_SIZE(os_module_globals_table),
-        .table = (mp_map_elem_t*)os_module_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(os_module_globals, os_module_globals_table);
 
 const mp_obj_module_t mp_module_uos = {
     .base = { &mp_type_module },
diff --git a/stmhal/moduselect.c b/stmhal/moduselect.c
index ec5910a712..0d5d6dd4ad 100644
--- a/stmhal/moduselect.c
+++ b/stmhal/moduselect.c
@@ -292,16 +292,7 @@ STATIC const mp_map_elem_t mp_module_select_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_poll), (mp_obj_t)&mp_select_poll_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_select_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_select_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_select_globals_table),
-        .table = (mp_map_elem_t*)mp_module_select_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_select_globals, mp_module_select_globals_table);
 
 const mp_obj_module_t mp_module_uselect = {
     .base = { &mp_type_module },
diff --git a/stmhal/modusocket.c b/stmhal/modusocket.c
index bab1087037..048f052982 100644
--- a/stmhal/modusocket.c
+++ b/stmhal/modusocket.c
@@ -133,16 +133,7 @@ STATIC const mp_map_elem_t mp_module_usocket_globals_table[] = {
     */
 };
 
-STATIC const mp_obj_dict_t mp_module_usocket_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_usocket_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_usocket_globals_table),
-        .table = (mp_map_elem_t*)mp_module_usocket_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_usocket_globals, mp_module_usocket_globals_table);
 
 const mp_obj_module_t mp_module_usocket = {
     .base = { &mp_type_module },
diff --git a/stmhal/modutime.c b/stmhal/modutime.c
index fd8fbb36af..0bc3245c48 100644
--- a/stmhal/modutime.c
+++ b/stmhal/modutime.c
@@ -344,16 +344,7 @@ STATIC const mp_map_elem_t time_module_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_time), (mp_obj_t)&time_time_obj },
 };
 
-STATIC const mp_obj_dict_t time_module_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(time_module_globals_table),
-        .alloc = MP_ARRAY_SIZE(time_module_globals_table),
-        .table = (mp_map_elem_t*)time_module_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(time_module_globals, time_module_globals_table);
 
 const mp_obj_module_t mp_module_utime = {
     .base = { &mp_type_module },
diff --git a/teensy/modpyb.c b/teensy/modpyb.c
index 18d3809cf3..67c5896a5a 100644
--- a/teensy/modpyb.c
+++ b/teensy/modpyb.c
@@ -354,16 +354,7 @@ STATIC const mp_map_elem_t pyb_module_globals_table[] = {
 //#endif
 };
 
-STATIC const mp_obj_dict_t pyb_module_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(pyb_module_globals_table),
-        .alloc = MP_ARRAY_SIZE(pyb_module_globals_table),
-        .table = (mp_map_elem_t*)pyb_module_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(pyb_module_globals, pyb_module_globals_table);
 
 const mp_obj_module_t pyb_module = {
     .base = { &mp_type_module },
diff --git a/unix/modffi.c b/unix/modffi.c
index 03b76e643b..331219a14b 100644
--- a/unix/modffi.c
+++ b/unix/modffi.c
@@ -433,16 +433,7 @@ STATIC const mp_map_elem_t mp_module_ffi_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_as_bytearray), (mp_obj_t)&mod_ffi_as_bytearray_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_ffi_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_ffi_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_ffi_globals_table),
-        .table = (mp_map_elem_t*)mp_module_ffi_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_ffi_globals, mp_module_ffi_globals_table);
 
 const mp_obj_module_t mp_module_ffi = {
     .base = { &mp_type_module },
diff --git a/unix/modos.c b/unix/modos.c
index 90998bcffe..712c528b4d 100644
--- a/unix/modos.c
+++ b/unix/modos.c
@@ -70,16 +70,7 @@ STATIC const mp_map_elem_t mp_module_os_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_stat), (mp_obj_t)&mod_os_stat_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_os_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_os_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_os_globals_table),
-        .table = (mp_map_elem_t*)mp_module_os_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_os_globals, mp_module_os_globals_table);
 
 const mp_obj_module_t mp_module_os = {
     .base = { &mp_type_module },
diff --git a/unix/modsocket.c b/unix/modsocket.c
index 82d833653f..749e58328e 100644
--- a/unix/modsocket.c
+++ b/unix/modsocket.c
@@ -453,16 +453,7 @@ STATIC const mp_map_elem_t mp_module_socket_globals_table[] = {
 #undef C
 };
 
-STATIC const mp_obj_dict_t mp_module_socket_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_socket_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_socket_globals_table),
-        .table = (mp_map_elem_t*)mp_module_socket_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_socket_globals, mp_module_socket_globals_table);
 
 const mp_obj_module_t mp_module_socket = {
     .base = { &mp_type_module },
diff --git a/unix/modtermios.c b/unix/modtermios.c
index f9884da903..0fa0e13947 100644
--- a/unix/modtermios.c
+++ b/unix/modtermios.c
@@ -137,16 +137,7 @@ STATIC const mp_map_elem_t mp_module_termios_globals_table[] = {
 #undef C
 };
 
-STATIC const mp_obj_dict_t mp_module_termios_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_termios_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_termios_globals_table),
-        .table = (mp_map_elem_t*)mp_module_termios_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_termios_globals, mp_module_termios_globals_table);
 
 const mp_obj_module_t mp_module_termios = {
     .base = { &mp_type_module },
diff --git a/unix/modtime.c b/unix/modtime.c
index 15352735c6..84f041fedf 100644
--- a/unix/modtime.c
+++ b/unix/modtime.c
@@ -108,16 +108,7 @@ STATIC const mp_map_elem_t mp_module_time_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_time), (mp_obj_t)&mod_time_time_obj },
 };
 
-STATIC const mp_obj_dict_t mp_module_time_globals = {
-    .base = {&mp_type_dict},
-    .map = {
-        .all_keys_are_qstrs = 1,
-        .table_is_fixed_array = 1,
-        .used = MP_ARRAY_SIZE(mp_module_time_globals_table),
-        .alloc = MP_ARRAY_SIZE(mp_module_time_globals_table),
-        .table = (mp_map_elem_t*)mp_module_time_globals_table,
-    },
-};
+STATIC MP_DEFINE_CONST_DICT(mp_module_time_globals, mp_module_time_globals_table);
 
 const mp_obj_module_t mp_module_time = {
     .base = { &mp_type_module },