diff --git a/skynet-src/skynet_mq.c b/skynet-src/skynet_mq.c
index b6f767f6..7d4fb093 100644
--- a/skynet-src/skynet_mq.c
+++ b/skynet-src/skynet_mq.c
@@ -60,10 +60,8 @@ skynet_globalmq_pop() {
 		return NULL;
 	}
 
-	__sync_synchronize();
-
 	if(!q->flag[head_ptr]) {
-        return NULL;
+		return NULL;
 	}
 
 	struct message_queue * mq = q->queue[head_ptr];