diff --git a/ext-src/swoole_thread.cc b/ext-src/swoole_thread.cc
index dd6fba48baf..3fd5edfebea 100644
--- a/ext-src/swoole_thread.cc
+++ b/ext-src/swoole_thread.cc
@@ -43,7 +43,6 @@ static struct {
     int argc;
 } request_info;
 
-//TSRMLS_CACHE_DEFINE();
 TSRMLS_CACHE_EXTERN()
 
 typedef std::thread Thread;