diff --git a/src/system/detail/src/vnodeQueryImpl.c b/src/system/detail/src/vnodeQueryImpl.c
index 4addadd72be27d0d45f8ed3477dd9306708f8458..877602c97fafe2fcb03304049ecc27c0519e4bdd 100644
--- a/src/system/detail/src/vnodeQueryImpl.c
+++ b/src/system/detail/src/vnodeQueryImpl.c
@@ -5837,6 +5837,7 @@ int32_t doMergeMetersResultsToGroupRes(STableQuerySupportObj *pSupporter, SQuery
       } else {  // copy data to disk buffer
         if (buffer[0]->numOfElems == pQuery->pointsToRead) {
           if (flushFromResultBuf(pSupporter, pQuery, pRuntimeEnv) != TSDB_CODE_SUCCESS) {
+            tfree(pTree);
             return -1;
           }