diff --git a/source/dnode/vnode/src/tsdb/tsdbUtil.c b/source/dnode/vnode/src/tsdb/tsdbUtil.c
index dd11134bd0..c6f0310599 100644
--- a/source/dnode/vnode/src/tsdb/tsdbUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbUtil.c
@@ -1259,6 +1259,7 @@ void tBlockDataReset(SBlockData *pBlockData) {
   pBlockData->suid = 0;
   pBlockData->uid = 0;
   pBlockData->nRow = 0;
+  pBlockData->nColData = 0;
 }
 
 void tBlockDataClear(SBlockData *pBlockData) {