1 files changed, 1 insertions, 0 deletions
diff --git a/vm_core.h b/vm_core.h
index 5fc7b2b3ba..861cae0018 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -455,6 +455,7 @@ enum ruby_special_exceptions {
     ruby_error_reenter,
     ruby_error_nomemory,
     ruby_error_sysstack,
+    ruby_error_sysstack_gc,
     ruby_error_stream_closed,
     ruby_special_error_count
 };