1 files changed, 1 insertions, 0 deletions
diff --git a/py/obj.h b/py/obj.h
index 5757810c96..30a60b77d0 100644
--- a/py/obj.h
+++ b/py/obj.h
@@ -401,6 +401,7 @@ mp_obj_t mp_obj_new_module(qstr module_name);
 mp_obj_type_t *mp_obj_get_type(mp_const_obj_t o_in);
 const char *mp_obj_get_type_str(mp_const_obj_t o_in);
 bool mp_obj_is_subclass_fast(mp_const_obj_t object, mp_const_obj_t classinfo); // arguments should be type objects
+mp_obj_t mp_instance_cast_to_native_base(mp_const_obj_t self_in, mp_const_obj_t native_type);
 
 void mp_obj_print_helper(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind);
 void mp_obj_print(mp_obj_t o, mp_print_kind_t kind);