diff --git a/source/dnode/vnode/src/tsdb/tsdbUtil.c b/source/dnode/vnode/src/tsdb/tsdbUtil.c
index 44621bf4e6..076db8b3ca 100644
--- a/source/dnode/vnode/src/tsdb/tsdbUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbUtil.c
@@ -642,8 +642,8 @@ SColVal *tsdbRowIterNext(STSDBRowIter *pIter) {
       return &pIter->cv;
     }
 
-    if (pIter->iColData < pIter->pRow->pBlockData->nColData) {
-      tColDataGetValue(&pIter->pRow->pBlockData->aColData[pIter->iColData], pIter->pRow->iRow, &pIter->cv);
+    if (pIter->iColData <= pIter->pRow->pBlockData->nColData) {
+      tColDataGetValue(&pIter->pRow->pBlockData->aColData[pIter->iColData - 1], pIter->pRow->iRow, &pIter->cv);
       ++pIter->iColData;
       return &pIter->cv;
     } else {