diff --git a/game/builtin/room.go b/game/builtin/room.go
index 221e63b..c5ee1c3 100644
--- a/game/builtin/room.go
+++ b/game/builtin/room.go
@@ -68,7 +68,7 @@ func (slf *Room[PlayerID, Player]) ChangeOwner(id PlayerID) {
 
 func (slf *Room[PlayerID, Player]) Join(player Player) error {
 	if slf.players.Size() >= slf.playerLimit && slf.playerLimit > 0 {
-		return ErrWorldPlayerLimit
+		return ErrRoomPlayerLimit
 	}
 	log.Debug("Room.Join", zap.Any("guid", slf.GetGuid()), zap.Any("player", player.GetID()))
 	slf.players.Set(player.GetID(), player)
diff --git a/game/builtin/room_errors.go b/game/builtin/room_errors.go
index 17f0d80..a8e8e41 100644
--- a/game/builtin/room_errors.go
+++ b/game/builtin/room_errors.go
@@ -3,6 +3,7 @@ package builtin
 import "errors"
 
 var (
+	ErrRoomPlayerLimit = errors.New("the number of players in the room has reached the upper limit") // 玩家数量达到上限
 	ErrRoomNoHasMaster = errors.New("room not has master, can't kick player")
 	ErrRoomNotIsOwner  = errors.New("not is room owner, can't kick player")
 )