1 files changed, 1 insertions, 1 deletions
diff --git a/gc.c b/gc.c
index 26cf554d82..ad386893da 100644
--- a/gc.c
+++ b/gc.c
@@ -1894,7 +1894,7 @@ object_id0(VALUE obj)
 {
     VALUE id = Qfalse;
 
-    if (rb_shape_has_object_id(rb_obj_shape(obj))) {
+    if (rb_shape_id_has_object_id(RBASIC_SHAPE_ID(obj))) {
         shape_id_t object_id_shape_id = rb_shape_transition_object_id(obj);
         id = rb_obj_field_get(obj, object_id_shape_id);
         RUBY_ASSERT(id, "object_id missing");