diff --git a/source/libs/qcom/src/queryUtil.c b/source/libs/qcom/src/queryUtil.c
index 4cad6a078b02e34777e052248a429a3626a8b81e..41333e77566f26b34e3a37f7181c59e129fd4d0e 100644
--- a/source/libs/qcom/src/queryUtil.c
+++ b/source/libs/qcom/src/queryUtil.c
@@ -415,7 +415,7 @@ int32_t cloneTableMeta(STableMeta* pSrc, STableMeta** pDst) {
     return TSDB_CODE_SUCCESS;
   }
 
-  int32_t metaSize = (pSrc->tableInfo.numOfColumns + pSrc->tableInfo.numOfTags) * sizeof(SSchema);
+  int32_t metaSize = sizeof(STableMeta) + (pSrc->tableInfo.numOfColumns + pSrc->tableInfo.numOfTags) * sizeof(SSchema);
   *pDst = taosMemoryMalloc(metaSize);
   if (NULL == *pDst) {
     return TSDB_CODE_TSC_OUT_OF_MEMORY;