diff --git a/webapp/controller/BattleController.class.php b/webapp/controller/BattleController.class.php
index d10f5544..f8835df3 100644
--- a/webapp/controller/BattleController.class.php
+++ b/webapp/controller/BattleController.class.php
@@ -1128,6 +1128,9 @@ class BattleController extends BaseAuthedController {
         if (!$mapModeMeta['is_open']) {
             return false;
         }
+        if ($mapModeMeta['map_mode'] == 501) {
+            return false;
+        }
         $roomUuid = $customData['room_uuid'];
         if ($r->get(DEC_BATTLE_TICKET . $roomUuid)) {
             return true;