diff --git a/src/system/detail/src/mgmtSupertableQuery.c b/src/system/detail/src/mgmtSupertableQuery.c
index f83ffd42477c17c8c20b67aed0956fd1e15737eb..1b7ae66e6d5b01dd15e0dc26d91a03e37a2e29ab 100644
--- a/src/system/detail/src/mgmtSupertableQuery.c
+++ b/src/system/detail/src/mgmtSupertableQuery.c
@@ -329,7 +329,7 @@ int32_t mgmtDoJoin(SMetricMetaMsg* pMetricMetaMsg, tQueryResultset* pRes) {
 
   bool allEmpty = false;
   for (int32_t i = 0; i < pMetricMetaMsg->numOfMeters; ++i) {
-    if (pRes->num == 0) {  // all results are empty if one of them is empty
+    if (pRes[i].num == 0) {  // all results are empty if one of them is empty
       allEmpty = true;
       break;
     }