diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 2d68289587..a1d0e11f9d 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -1312,7 +1312,7 @@ int tscBuildCreateTableMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   if (type == TSQL_CREATE_TABLE_FROM_STABLE) {  // create by using super table, tags value
     SArray* list = pInfo->pCreateTableInfo->childTableInfo;
 
-    int32_t numOfTables = taosArrayGetSize(list);
+    int32_t numOfTables = (int32_t) taosArrayGetSize(list);
     pCreateTableMsg->numOfTables = htonl(numOfTables);
 
     pMsg = (char*) pCreateMsg;