diff --git a/py/builtin.h b/py/builtin.h
index 337524899a..caca71b523 100644
--- a/py/builtin.h
+++ b/py/builtin.h
@@ -38,6 +38,7 @@ MP_DECLARE_CONST_FUN_OBJ(mp_namedtuple_obj);
 MP_DECLARE_CONST_FUN_OBJ(mp_op_contains_obj);
 MP_DECLARE_CONST_FUN_OBJ(mp_op_getitem_obj);
 MP_DECLARE_CONST_FUN_OBJ(mp_op_setitem_obj);
+MP_DECLARE_CONST_FUN_OBJ(mp_op_delitem_obj);
 
 extern const mp_obj_module_t mp_module___main__;
 extern const mp_obj_module_t mp_module_array;
diff --git a/py/objdict.c b/py/objdict.c
index 1bebf08647..19d9ae9e9f 100644
--- a/py/objdict.c
+++ b/py/objdict.c
@@ -498,6 +498,7 @@ STATIC const mp_map_elem_t dict_locals_dict_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_values), (mp_obj_t)&dict_values_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR___getitem__), (mp_obj_t)&mp_op_getitem_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR___setitem__), (mp_obj_t)&mp_op_setitem_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR___delitem__), (mp_obj_t)&mp_op_delitem_obj },
 };
 
 STATIC MP_DEFINE_CONST_DICT(dict_locals_dict, dict_locals_dict_table);
diff --git a/py/opmethods.c b/py/opmethods.c
index f0f19b6dfb..27415fef9b 100644
--- a/py/opmethods.c
+++ b/py/opmethods.c
@@ -19,6 +19,12 @@ STATIC mp_obj_t op_setitem(mp_obj_t self_in, mp_obj_t key_in, mp_obj_t value_in)
 }
 MP_DEFINE_CONST_FUN_OBJ_3(mp_op_setitem_obj, op_setitem);
 
+STATIC mp_obj_t op_delitem(mp_obj_t self_in, mp_obj_t key_in) {
+    mp_store_subscr(self_in, key_in, MP_OBJ_NULL);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_2(mp_op_delitem_obj, op_delitem);
+
 STATIC mp_obj_t op_contains(mp_obj_t lhs_in, mp_obj_t rhs_in) {
     mp_obj_type_t *type = mp_obj_get_type(lhs_in);
     return type->binary_op(MP_BINARY_OP_IN, lhs_in, rhs_in);
diff --git a/py/qstrdefs.h b/py/qstrdefs.h
index df383b776c..c2d538d1f1 100644
--- a/py/qstrdefs.h
+++ b/py/qstrdefs.h
@@ -24,6 +24,7 @@ Q(__len__)
 Q(__iter__)
 Q(__getitem__)
 Q(__setitem__)
+Q(__delitem__)
 Q(__add__)
 Q(__sub__)
 Q(__repr__)