diff --git a/server/gameserver/roommgr.cc b/server/gameserver/roommgr.cc
index fbb2d9a3..bbf8d043 100644
--- a/server/gameserver/roommgr.cc
+++ b/server/gameserver/roommgr.cc
@@ -113,6 +113,9 @@ void RoomMgr::_CMJoin(f8::MsgHdr& hdr, const cs::CMJoin& msg)
         JoinErrorHandle(msg, 3, hdr.socket_handle);
         return;
     }
+    if (!msg.custom_room_payload().empty()) {
+        _CMJoinCustomBattle(hdr, msg);
+    }
     std::shared_ptr<cs::CMJoin> join_msg = std::make_shared<cs::CMJoin>();
     *join_msg = msg;
     std::vector<std::shared_ptr<cs::CMJoin>> join_msgs{join_msg};
@@ -841,6 +844,11 @@ std::shared_ptr<CustomBattle> RoomMgr::GetHisCustomRoom(const std::string& room_
     return itr != his_custom_room_hash_.end() ? itr->second : nullptr;
 }
 
+void RoomMgr::_CMJoinCustomBattle(f8::MsgHdr& hdr, const cs::CMJoin& msg)
+{
+
+}
+
 void RoomMgr::SendGetCustomBattleData(std::shared_ptr<cs::CMJoin> join_msg,
                                       std::function<void(int, const std::string, std::shared_ptr<CustomBattle>)> cb)
 {
diff --git a/server/gameserver/roommgr.h b/server/gameserver/roommgr.h
index 6146a5bf..184e4251 100644
--- a/server/gameserver/roommgr.h
+++ b/server/gameserver/roommgr.h
@@ -118,6 +118,7 @@ class RoomMgr : public a8::Singleton<RoomMgr>
     void AdjustCMJoin(cs::CMJoin* msg);
     std::shared_ptr<CustomBattle> GetCustomRoom(const std::string& room_uuid);
     std::shared_ptr<CustomBattle> GetHisCustomRoom(const std::string& room_uuid);
+    void _CMJoinCustomBattle(f8::MsgHdr& hdr, const cs::CMJoin& msg);
     void SendGetCustomBattleData(std::shared_ptr<cs::CMJoin> join_msg,
                                  std::function<void(int, const std::string, std::shared_ptr<CustomBattle>)> cb);