diff --git a/source/dnode/vnode/src/tsdb/tsdbMemTable.c b/source/dnode/vnode/src/tsdb/tsdbMemTable.c
index 46f5aefba0..bf47f25e15 100644
--- a/source/dnode/vnode/src/tsdb/tsdbMemTable.c
+++ b/source/dnode/vnode/src/tsdb/tsdbMemTable.c
@@ -307,7 +307,7 @@ void tsdbMemTableCountRows(SMemTable *pMemTable, SHashObj*        pTableMap, int
         continue;
       }
       
-      rowsNum += tsdbCountTbDataRows(pTbData);
+      *rowsNum += tsdbCountTbDataRows(pTbData);
       pTbData = pTbData->next;
     }
   }