diff --git a/server/gameserver/roommgr.cc b/server/gameserver/roommgr.cc
index 65b20e0a..a6b60c08 100644
--- a/server/gameserver/roommgr.cc
+++ b/server/gameserver/roommgr.cc
@@ -1155,13 +1155,14 @@ void RoomMgr::_CMJoinMoba(f8::MsgHdr* hdr, const cs::CMJoin& msg)
 
 void RoomMgr::DispatchSpecRoom(f8::MsgHdr* hdr, const cs::CMJoin& msg)
 {
-    if (msg.payload_data().empty()) {
+    if (msg.payload_data().empty() ||
+        msg.payload_data().size() < 10) {
         return;
     }
     if (msg.payload_data().at(0) == '?') {
 
     } else {
-
+        _CMJoinCustomBattle(hdr, msg);
     }
 }