diff --git a/src/gc.c b/src/gc.c
index a0f430457..d6c881a8f 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -995,6 +995,7 @@ incremental_marking_phase(mrb_state *mrb, mrb_gc *gc, size_t limit)
 static void
 final_marking_phase(mrb_state *mrb, mrb_gc *gc)
 {
+  mrb_gc_mark_gv(mrb);
   mark_context(mrb, mrb->c);
   mrb_gc_mark(mrb, (struct RBasic*)mrb->exc);
   gc_mark_gray_list(mrb, gc);