diff --git a/source/dnode/vnode/src/meta/metaTable.c b/source/dnode/vnode/src/meta/metaTable.c
index 6967d79d12..a4e665e225 100644
--- a/source/dnode/vnode/src/meta/metaTable.c
+++ b/source/dnode/vnode/src/meta/metaTable.c
@@ -1381,7 +1381,7 @@ static int metaAlterTableColumn(SMeta *pMeta, int64_t version, SVAlterTbReq *pAl
         terrno = TSDB_CODE_VND_COL_NOT_EXISTS;
         goto _err;
       }
-      if (!IS_VAR_DATA_TYPE(pColumn->type) || pColumn->bytes > pAlterTbReq->colModBytes) {
+      if (!IS_VAR_DATA_TYPE(pColumn->type) || pColumn->bytes >= pAlterTbReq->colModBytes) {
         terrno = TSDB_CODE_VND_INVALID_TABLE_ACTION;
         goto _err;
       }