diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index ca6912cdd887a1fdb200bee82cbf542c517f08a3..5e4ab00b4158d2f1c15b3fe47e3a296ff429edfa 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -1620,7 +1620,7 @@ static void mergeTwoRowFromMem(STsdbQueryHandle* pQueryHandle, int32_t capacity,
       SColIdx *pColIdx = kvRowColIdxAt(rowBody, chosen_itr);
       colId = pColIdx->colId;
       offset = pColIdx->offset;
-      value = tdGetKvRowDataOfCol(rowBody, pColIdx->offset);
+      value = tdGetKvRowDataOfCol(rowBody, offset);
     }