1 files changed, 1 insertions, 0 deletions
diff --git a/src/gc.c b/src/gc.c
index 1608dbcb2..63eab8e00 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -865,6 +865,7 @@ root_scan_phase(mrb_state *mrb, mrb_gc *gc)
   }
   /* mark pre-allocated exception */
   mrb_gc_mark(mrb, (struct RBasic*)mrb->nomem_err);
+  mrb_gc_mark(mrb, (struct RBasic*)mrb->stack_err);
 #ifdef MRB_GC_FIXED_ARENA
   mrb_gc_mark(mrb, (struct RBasic*)mrb->arena_err);
 #endif