diff --git a/source/common/src/ttime.c b/source/common/src/ttime.c
index d8c43747f7b92822fad5455a143e35c5e918f15c..7a5581efbe210a64c2201830b7634dc7baca279c 100644
--- a/source/common/src/ttime.c
+++ b/source/common/src/ttime.c
@@ -969,7 +969,7 @@ void taosFormatUtcTime(char* buf, int32_t bufLen, int64_t t, int32_t precision)
 
     default:
       fractionLen = 0;
-      ASSERT(false);
+      return;
   }
 
   if (taosLocalTime(&quot, &ptm, buf) == NULL) {