diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index 4076679ff4..00052cc810 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -2349,9 +2349,9 @@ static void taosCheckAndSetDebugFlag(int32_t *pFlagPtr, char *name, int32_t flag
   int32_t code = 0;
   if ((code = taosSetDebugFlag(pFlagPtr, name, flag)) != 0) {
     if (code != TSDB_CODE_CFG_NOT_FOUND) {
-      uError("failed to set flag %s to %d", name, flag);
+      uError("failed to set flag %s to %d, since:%s", name, flag, tstrerror(code));
     } else {
-      uDebug("failed to set flag %s to %d", name, flag);
+      uDebug("failed to set flag %s to %d, since:%s", name, flag, tstrerror(code));
     }
   }
   return;