diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index b1c7cdc..b0d957b 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -779,6 +779,7 @@ void Room::UpdateGas()
                 }
                 NotifyWxVoip();
                 RoomMgr::Instance()->ActiveRoom(room_uuid);
+                battle_start_frameno_ = frame_no;
             }
         }
         break;