diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index 20edb02c38..6c96f1f0d2 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -1068,7 +1068,7 @@ static int32_t mnodeProcessCreateSuperTableMsg(SMnodeMsg *pMsg) {
   pStable->info.tableId = strdup(pCreate->tableName);
   pStable->info.type    = TSDB_SUPER_TABLE;
   pStable->createdTime  = taosGetTimestampMs();
-  int64_t x = (us&0x000000FFFFFFFFFF);
+  uint64_t x = (us&0x000000FFFFFFFFFF);
   x = x<<24;
   pStable->uid          = x + ((sdbGetVersion() & ((1ul << 16) - 1ul)) << 8) + (taosRand() & ((1ul << 8) - 1ul));
   pStable->sversion     = 0;