diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index bfd913dcf5f5fc6e01d48ff7affe96ec25bfc2c7..8a50299d513d129fd66509718081153412d439d3 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -1856,7 +1856,7 @@ int tscProcessSTableVgroupRsp(SSqlObj *pSql) {
       pVgroups->vgId = htonl(vgroupMsg->vgId);
       pVgroups->numOfEps = vgroupMsg->numOfEps;
 
-      assert(pVgroups->numOfEps >= 1);
+      assert(pVgroups->numOfEps >= 1 && pVgroups->vgId >= 1);
 
       for (int32_t k = 0; k < pVgroups->numOfEps; ++k) {
         pVgroups->epAddr[k].port = htons(vgroupMsg->epAddr[k].port);