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-rw-r--r--py/objtype.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/py/objtype.h b/py/objtype.h
index 2c613b9045..76a290760c 100644
--- a/py/objtype.h
+++ b/py/objtype.h
@@ -46,8 +46,8 @@ mp_obj_instance_t *mp_obj_new_instance(const mp_obj_type_t *cls, const mp_obj_ty
bool mp_obj_instance_is_callable(mp_obj_t self_in);
mp_obj_t mp_obj_instance_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args);
-#define mp_obj_is_instance_type(type) ((type)->make_new == mp_obj_instance_make_new)
-#define mp_obj_is_native_type(type) ((type)->make_new != mp_obj_instance_make_new)
+#define mp_obj_is_instance_type(type) (MP_OBJ_TYPE_GET_SLOT_OR_NULL(type, make_new) == mp_obj_instance_make_new)
+#define mp_obj_is_native_type(type) (MP_OBJ_TYPE_GET_SLOT_OR_NULL(type, make_new) != mp_obj_instance_make_new)
// this needs to be exposed for the above macros to work correctly
mp_obj_t mp_obj_instance_make_new(const mp_obj_type_t *self_in, size_t n_args, size_t n_kw, const mp_obj_t *args);