diff --git a/source/libs/function/src/tudf.c b/source/libs/function/src/tudf.c
index 66e503fd89..ad9e5ce7d4 100644
--- a/source/libs/function/src/tudf.c
+++ b/source/libs/function/src/tudf.c
@@ -229,6 +229,7 @@ static void udfWatchUdfd(void *args) {
   if(uv_loop_close(&pData->loop) != 0) {
     fnError("udfd loop close failed, lino:%d", __LINE__);
   }
+  return;
 
 _exit:
   if (terrno != 0) {