1 files changed, 1 insertions, 0 deletions
diff --git a/env.h b/env.h
index bdaac91950..5875dc6ee9 100644
--- a/env.h
+++ b/env.h
@@ -19,6 +19,7 @@ extern struct FRAME {
     VALUE last_class;
     VALUE cbase;
     struct FRAME *prev;
+    struct FRAME *tmp;
     char *file;
     int line;
     int iter;