diff --git a/source/dnode/mnode/impl/inc/mndDef.h b/source/dnode/mnode/impl/inc/mndDef.h
index 0605e3a69e..693cb77b6d 100644
--- a/source/dnode/mnode/impl/inc/mndDef.h
+++ b/source/dnode/mnode/impl/inc/mndDef.h
@@ -222,7 +222,7 @@ typedef struct {
 
 typedef struct {
   char      user[TSDB_USER_LEN];
-  char      pass[TSDB_PASSWORD_LEN];
+  char      pass[TSDB_PASSWORD_LEN + 1];
   char      acct[TSDB_USER_LEN];
   int64_t   createdTime;
   int64_t   updateTime;
diff --git a/source/dnode/mnode/impl/src/mndProfile.c b/source/dnode/mnode/impl/src/mndProfile.c
index 832e328d96..08da1d54d9 100644
--- a/source/dnode/mnode/impl/src/mndProfile.c
+++ b/source/dnode/mnode/impl/src/mndProfile.c
@@ -230,7 +230,7 @@ static int32_t mndProcessConnectReq(SRpcMsg *pReq) {
     mGError("user:%s, failed to login while acquire user since %s", pReq->info.conn.user, terrstr());
     goto CONN_OVER;
   }
-  if (0 != strncmp(connReq.passwd, pUser->pass, TSDB_PASSWORD_LEN - 1)) {
+  if (0 != strncmp(connReq.passwd, pUser->pass, TSDB_PASSWORD_LEN)) {
     mGError("user:%s, failed to auth while acquire user, input:%s", pReq->info.conn.user, connReq.passwd);
     code = TSDB_CODE_RPC_AUTH_FAILURE;
     goto CONN_OVER;