diff --git a/server/gameserver/roommgr.cc b/server/gameserver/roommgr.cc
index ad3e6f5..d1fdd6e 100644
--- a/server/gameserver/roommgr.cc
+++ b/server/gameserver/roommgr.cc
@@ -579,6 +579,9 @@ std::string RoomMgr::GenTeamHashData(const std::string& team_uuid, std::map<std:
 
 void RoomMgr::OnJoinRoomOk(const cs::CMJoin& msg, Player* hum)
 {
+    if (msg.team_uuid().empty()) {
+        return;
+    }
     std::map<std::string, long long>* team_hash = nullptr;
     {
         auto itr = team_room_hash_.find(msg.team_uuid());