diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index dc02a72..0461fb9 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -592,7 +592,7 @@ bool Room::CanJoin(const std::string& accountid, RoomType_e self_room_type)
         }
     }
     if (room_type_ == RT_MidBrid) {
-        if (room_type_ != self_room_type || GetPlayerNum() > 4) {
+        if (room_type_ != self_room_type || GetPlayerNum() >= 4) {
             return false;
         }
     }