diff --git a/webapp/controller/BattleController.class.php b/webapp/controller/BattleController.class.php
index bff26aa5..b684df94 100644
--- a/webapp/controller/BattleController.class.php
+++ b/webapp/controller/BattleController.class.php
@@ -1176,6 +1176,12 @@ class BattleController extends BaseAuthedController {
 
     public function requestAllocBoxNum()
     {
+        if (!myself()->_switchIsOpen('bigEventBoxDrop')) {
+            myself()->_rspData(array(
+                'box_num' => 0
+            ));
+            return;
+        }
         $roomUuid = getReqVal('room_uuid', '');
         $row = SqlHelper::ormSelectOne(
             $this->_getSelfMysql(),