diff --git a/source/dnode/mnode/impl/src/mndUser.c b/source/dnode/mnode/impl/src/mndUser.c
index 2d00e383a23507f65a11ee0e31dc3d814c33f5fe..1fc2e42b8ca9be737adfb60e8312c390dbf3f5b7 100644
--- a/source/dnode/mnode/impl/src/mndUser.c
+++ b/source/dnode/mnode/impl/src/mndUser.c
@@ -802,7 +802,7 @@ static int32_t mndProcessAlterUserReq(SRpcMsg *pReq) {
   }
 
   if (TSDB_ALTER_USER_PASSWD == alterReq.alterType && 
-      (alterReq.pass[0] == 0 || strlen(alterReq.pass) > TSDB_PASSWORD_LEN)) {
+      (alterReq.pass[0] == 0 || strlen(alterReq.pass) >= TSDB_PASSWORD_LEN)) {
     terrno = TSDB_CODE_MND_INVALID_PASS_FORMAT;
     goto _OVER;
   }