diff --git a/extmod/modure.c b/extmod/modure.c
index a20f3ee429..bb54bc732f 100644
--- a/extmod/modure.c
+++ b/extmod/modure.c
@@ -43,7 +43,7 @@ STATIC mp_obj_t match_group(mp_obj_t self_in, mp_obj_t no_in) {
     mp_obj_match_t *self = MP_OBJ_TO_PTR(self_in);
     mp_int_t no = mp_obj_get_int(no_in);
     if (no < 0 || no >= self->num_matches) {
-        nlr_raise(mp_obj_new_exception_arg1(&mp_type_IndexError, no_in));
+        mp_raise_arg1(&mp_type_IndexError, no_in);
     }
 
     const char *start = self->caps[no * 2];
@@ -82,7 +82,7 @@ STATIC void match_span_helper(size_t n_args, const mp_obj_t *args, mp_obj_t span
     if (n_args == 2) {
         no = mp_obj_get_int(args[1]);
         if (no < 0 || no >= self->num_matches) {
-            nlr_raise(mp_obj_new_exception_arg1(&mp_type_IndexError, args[1]));
+            mp_raise_arg1(&mp_type_IndexError, args[1]);
         }
     }
 
@@ -326,7 +326,7 @@ STATIC mp_obj_t re_sub_helper(mp_obj_t self_in, size_t n_args, const mp_obj_t *a
                     }
 
                     if (match_no >= (unsigned int)match->num_matches) {
-                        nlr_raise(mp_obj_new_exception_arg1(&mp_type_IndexError, MP_OBJ_NEW_SMALL_INT(match_no)));
+                        mp_raise_arg1(&mp_type_IndexError, MP_OBJ_NEW_SMALL_INT(match_no));
                     }
 
                     const char *start_match = match->caps[match_no * 2];
diff --git a/extmod/moduzlib.c b/extmod/moduzlib.c
index 8422e75983..b344f96429 100644
--- a/extmod/moduzlib.c
+++ b/extmod/moduzlib.c
@@ -179,7 +179,7 @@ STATIC mp_obj_t mod_uzlib_decompress(size_t n_args, const mp_obj_t *args) {
     return res;
 
 error:
-        nlr_raise(mp_obj_new_exception_arg1(&mp_type_ValueError, MP_OBJ_NEW_SMALL_INT(st)));
+    mp_raise_arg1(&mp_type_ValueError, MP_OBJ_NEW_SMALL_INT(st));
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_uzlib_decompress_obj, 1, 3, mod_uzlib_decompress);
 
diff --git a/ports/unix/modjni.c b/ports/unix/modjni.c
index 8ec5ae54d9..82d1ccd559 100644
--- a/ports/unix/modjni.c
+++ b/ports/unix/modjni.c
@@ -102,9 +102,9 @@ STATIC void check_exception(void) {
         mp_obj_t py_e = new_jobject(exc);
         JJ1(ExceptionClear);
         if (JJ(IsInstanceOf, exc, IndexException_class)) {
-            nlr_raise(mp_obj_new_exception_arg1(&mp_type_IndexError, py_e));
+            mp_raise_arg1(&mp_type_IndexError, py_e);
         }
-        nlr_raise(mp_obj_new_exception_arg1(&mp_type_Exception, py_e));
+        mp_raise_arg1(&mp_type_Exception, py_e);
     }
 }
 
diff --git a/py/modsys.c b/py/modsys.c
index a1d2cf831c..31f28a36fa 100644
--- a/py/modsys.c
+++ b/py/modsys.c
@@ -96,7 +96,7 @@ STATIC mp_obj_t mp_sys_exit(size_t n_args, const mp_obj_t *args) {
     if (n_args == 0) {
         exc = mp_obj_new_exception(&mp_type_SystemExit);
     } else {
-        exc = mp_obj_new_exception_arg1(&mp_type_SystemExit, args[0]);
+        mp_raise_arg1(&mp_type_SystemExit, args[0]);
     }
     nlr_raise(exc);
 }
diff --git a/py/objdict.c b/py/objdict.c
index 63fd86f357..098aec5d2f 100644
--- a/py/objdict.c
+++ b/py/objdict.c
@@ -169,7 +169,7 @@ mp_obj_t mp_obj_dict_get(mp_obj_t self_in, mp_obj_t index) {
     mp_obj_dict_t *self = MP_OBJ_TO_PTR(self_in);
     mp_map_elem_t *elem = mp_map_lookup(&self->map, index, MP_MAP_LOOKUP);
     if (elem == NULL) {
-        nlr_raise(mp_obj_new_exception_arg1(&mp_type_KeyError, index));
+        mp_raise_arg1(&mp_type_KeyError, index);
     } else {
         return elem->value;
     }
@@ -185,7 +185,7 @@ STATIC mp_obj_t dict_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
         mp_obj_dict_t *self = MP_OBJ_TO_PTR(self_in);
         mp_map_elem_t *elem = mp_map_lookup(&self->map, index, MP_MAP_LOOKUP);
         if (elem == NULL) {
-            nlr_raise(mp_obj_new_exception_arg1(&mp_type_KeyError, index));
+            mp_raise_arg1(&mp_type_KeyError, index);
         } else {
             return elem->value;
         }
@@ -272,7 +272,7 @@ STATIC mp_obj_t dict_get_helper(size_t n_args, const mp_obj_t *args, mp_map_look
     if (elem == NULL || elem->value == MP_OBJ_NULL) {
         if (n_args == 2) {
             if (lookup_kind == MP_MAP_LOOKUP_REMOVE_IF_FOUND) {
-                nlr_raise(mp_obj_new_exception_arg1(&mp_type_KeyError, args[1]));
+                mp_raise_arg1(&mp_type_KeyError, args[1]);
             } else {
                 value = mp_const_none;
             }
diff --git a/py/objset.c b/py/objset.c
index 45b5c12606..c5d54aede5 100644
--- a/py/objset.c
+++ b/py/objset.c
@@ -378,7 +378,7 @@ STATIC mp_obj_t set_remove(mp_obj_t self_in, mp_obj_t item) {
     check_set(self_in);
     mp_obj_set_t *self = MP_OBJ_TO_PTR(self_in);
     if (mp_set_lookup(&self->set, item, MP_MAP_LOOKUP_REMOVE_IF_FOUND) == MP_OBJ_NULL) {
-        nlr_raise(mp_obj_new_exception_arg1(&mp_type_KeyError, item));
+        mp_raise_arg1(&mp_type_KeyError, item);
     }
     return mp_const_none;
 }
diff --git a/py/objstr.c b/py/objstr.c
index 6a03f5fc3e..34ccab86d6 100644
--- a/py/objstr.c
+++ b/py/objstr.c
@@ -1087,7 +1087,7 @@ STATIC vstr_t mp_obj_str_format_helper(const char *str, const char *top, int *ar
                 field_name = lookup;
                 mp_map_elem_t *key_elem = mp_map_lookup(kwargs, field_q, MP_MAP_LOOKUP);
                 if (key_elem == NULL) {
-                    nlr_raise(mp_obj_new_exception_arg1(&mp_type_KeyError, field_q));
+                    mp_raise_arg1(&mp_type_KeyError, field_q);
                 }
                 arg = key_elem->value;
             }
diff --git a/py/pystack.c b/py/pystack.c
index f79ea92101..0def75b109 100644
--- a/py/pystack.c
+++ b/py/pystack.c
@@ -43,8 +43,8 @@ void *mp_pystack_alloc(size_t n_bytes) {
     #endif
     if (MP_STATE_THREAD(pystack_cur) + n_bytes > MP_STATE_THREAD(pystack_end)) {
         // out of memory in the pystack
-        nlr_raise(mp_obj_new_exception_arg1(&mp_type_RuntimeError,
-            MP_OBJ_NEW_QSTR(MP_QSTR_pystack_space_exhausted)));
+        mp_raise_arg1(&mp_type_RuntimeError,
+            MP_OBJ_NEW_QSTR(MP_QSTR_pystack_space_exhausted));
     }
     void *ptr = MP_STATE_THREAD(pystack_cur);
     MP_STATE_THREAD(pystack_cur) += n_bytes;
diff --git a/py/runtime.c b/py/runtime.c
index e63e2337d9..3745e16e30 100644
--- a/py/runtime.c
+++ b/py/runtime.c
@@ -1514,6 +1514,10 @@ NORETURN void m_malloc_fail(size_t num_bytes) {
         translate("memory allocation failed, allocating %u bytes"), (uint)num_bytes);
 }
 
+NORETURN void mp_raise_arg1(const mp_obj_type_t *exc_type, mp_obj_t arg) {
+    nlr_raise(mp_obj_new_exception_arg1(exc_type, arg));
+}
+
 NORETURN void mp_raise_msg(const mp_obj_type_t *exc_type, const compressed_string_t *msg) {
     if (msg == NULL) {
         nlr_raise(mp_obj_new_exception(exc_type));
@@ -1580,7 +1584,7 @@ NORETURN void mp_raise_TypeError_varg(const compressed_string_t *fmt, ...) {
 }
 
 NORETURN void mp_raise_OSError(int errno_) {
-    nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(errno_)));
+    mp_raise_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(errno_));
 }
 
 NORETURN void mp_raise_OSError_msg(const compressed_string_t *msg) {
@@ -1607,7 +1611,7 @@ NORETURN void mp_raise_ConnectionError(const compressed_string_t *msg) {
 }
 
 NORETURN void mp_raise_BrokenPipeError(void) {
-    nlr_raise(mp_obj_new_exception_arg1(&mp_type_BrokenPipeError, MP_OBJ_NEW_SMALL_INT(MP_EPIPE)));
+    mp_raise_arg1(&mp_type_BrokenPipeError, MP_OBJ_NEW_SMALL_INT(MP_EPIPE));
 }
 
 NORETURN void mp_raise_NotImplementedError(const compressed_string_t *msg) {
diff --git a/py/runtime.h b/py/runtime.h
index ad7d0feaba..5e8fda35c1 100644
--- a/py/runtime.h
+++ b/py/runtime.h
@@ -150,6 +150,7 @@ mp_obj_t mp_import_name(qstr name, mp_obj_t fromlist, mp_obj_t level);
 mp_obj_t mp_import_from(mp_obj_t module, qstr name);
 void mp_import_all(mp_obj_t module);
 
+NORETURN void mp_raise_arg1(const mp_obj_type_t *exc_type, mp_obj_t arg);
 NORETURN void mp_raise_msg(const mp_obj_type_t *exc_type, const compressed_string_t *msg);
 NORETURN void mp_raise_msg_varg(const mp_obj_type_t *exc_type, const compressed_string_t *fmt, ...);
 NORETURN void mp_raise_msg_vlist(const mp_obj_type_t *exc_type, const compressed_string_t *fmt, va_list argptr);