diff --git a/server/gameserver/mt/MapMode.h b/server/gameserver/mt/MapMode.h
index a988ca9a..949964e5 100644
--- a/server/gameserver/mt/MapMode.h
+++ b/server/gameserver/mt/MapMode.h
@@ -6,6 +6,7 @@
 namespace mt
 {
     const int kPvpRankMode = 401;
+    const int kTreasureBoxMode = 501;
 
     DECLARE_ID_TABLE(MapMode, mtb::MapMode,
                      "mapMode@mapMode.json",