diff --git a/server/gameserver/room.h b/server/gameserver/room.h
index ae667c7..5b794d3 100644
--- a/server/gameserver/room.h
+++ b/server/gameserver/room.h
@@ -321,4 +321,6 @@ private:
     xtimer_list* auto_jump_timer_ = nullptr;
 
     RefreshRule* refresh_rule_ = nullptr;
+
+    friend class RefreshRule;
 };