1 files changed, 1 insertions, 1 deletions
diff --git a/eval.c b/eval.c
index 82d8b8beea..e3e06976cf 100644
--- a/eval.c
+++ b/eval.c
@@ -740,7 +740,7 @@ static unsigned long frame_unique = 0;
     ruby_frame = _frame.prev;		\
 } while (0)
 
-static unsigned long block_unique = 0;
+static unsigned long block_unique = 1;
 
 #define PUSH_BLOCK(v,iv,b) do {	\
     struct BLOCK _block;		\