diff --git a/utils/funcexp/func_add_time.cpp b/utils/funcexp/func_add_time.cpp
index b78572034..187f5638a 100644
--- a/utils/funcexp/func_add_time.cpp
+++ b/utils/funcexp/func_add_time.cpp
@@ -206,6 +206,7 @@ int64_t Func_add_time::getDatetimeIntVal(rowgroup::Row& row,
 		t2.hour = 838;
 		t2.minute = 59;
 		t2.second = 59;
+        t2.msecond = 999999;
 	}
 	else
 	{