diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index 7615c05c..4c78f37e 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -92,6 +92,7 @@ void Room::InitData(RoomInitInfo& init_info)
     map_service = init_info.map_service;
     map_instance = init_info.map_instance;
     map_meta_ = init_info.map_meta;
+    poly_ext_datas_ = map_instance->GetPolyExtDatas();
 }
 
 void Room::Init()