diff --git a/py/obj.h b/py/obj.h
index f372030b7e..43c0ed5e78 100644
--- a/py/obj.h
+++ b/py/obj.h
@@ -398,6 +398,7 @@ typedef struct _mp_obj_static_class_method_t {
 // sequence helpers
 void mp_seq_multiply(const void *items, uint item_sz, uint len, uint times, void *dest);
 bool m_seq_get_fast_slice_indexes(machine_uint_t len, mp_obj_t slice, machine_uint_t *begin, machine_uint_t *end);
-#define m_seq_copy(dest, src, len, item_sz) memcpy(dest, src, len * sizeof(item_sz))
+#define m_seq_copy(dest, src, len, item_t) memcpy(dest, src, len * sizeof(item_t))
+#define m_seq_cat(dest, src1, len1, src2, len2, item_t) { memcpy(dest, src1, len1 * sizeof(item_t)); memcpy(dest + len1, src2, len2 * sizeof(item_t)); }
 bool mp_seq_cmp_bytes(int op, const byte *data1, uint len1, const byte *data2, uint len2);
 bool mp_seq_cmp_objs(int op, const mp_obj_t *items1, uint len1, const mp_obj_t *items2, uint len2);
diff --git a/py/objlist.c b/py/objlist.c
index 29d0c92c52..9f20acbd41 100644
--- a/py/objlist.c
+++ b/py/objlist.c
@@ -114,8 +114,7 @@ static mp_obj_t list_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
             }
             mp_obj_list_t *p = rhs;
             mp_obj_list_t *s = list_new(o->len + p->len);
-            memcpy(s->items, o->items, sizeof(mp_obj_t) * o->len);
-            memcpy(s->items + o->len, p->items, sizeof(mp_obj_t) * p->len);
+            m_seq_cat(s->items, o->items, o->len, p->items, p->len, mp_obj_t);
             return s;
         }
         case RT_BINARY_OP_INPLACE_ADD:
diff --git a/py/objtuple.c b/py/objtuple.c
index 8c1320a5f7..b7710e1d53 100644
--- a/py/objtuple.c
+++ b/py/objtuple.c
@@ -114,6 +114,16 @@ static mp_obj_t tuple_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
             uint index = mp_get_index(o->base.type, o->len, rhs);
             return o->items[index];
         }
+        case RT_BINARY_OP_ADD:
+        {
+            if (!MP_OBJ_IS_TYPE(rhs, &tuple_type)) {
+                return NULL;
+            }
+            mp_obj_tuple_t *p = rhs;
+            mp_obj_tuple_t *s = mp_obj_new_tuple(o->len + p->len, NULL);
+            m_seq_cat(s->items, o->items, o->len, p->items, p->len, mp_obj_t);
+            return s;
+        }
         case RT_BINARY_OP_EQUAL:
         case RT_BINARY_OP_LESS:
         case RT_BINARY_OP_LESS_EQUAL:
diff --git a/tests/basics/tuple1.py b/tests/basics/tuple1.py
index b64720b3eb..53eac2a306 100644
--- a/tests/basics/tuple1.py
+++ b/tests/basics/tuple1.py
@@ -14,3 +14,5 @@ except AttributeError:
 print(x[1:])
 print(x[:-1])
 print(x[2:3])
+
+print(x + (10, 100, 10000))