diff --git a/webapp/controller/ShopController.class.php b/webapp/controller/ShopController.class.php
index 0289982d..535aadc7 100644
--- a/webapp/controller/ShopController.class.php
+++ b/webapp/controller/ShopController.class.php
@@ -618,10 +618,9 @@ class ShopController extends BaseAuthedController
                     $this->addFreeBuyRecord($row);
                 }
                 $this->_decItems($costItems);
-
                 $event = [
                     'name' => LogService::SHOP_BUY_ITEM,
-                    'val' => $costItems['item_num']
+                    'val' => $costItems[0]['item_num']
                 ];
                 LogService::consumeDiamond($event);
 
@@ -821,7 +820,7 @@ class ShopController extends BaseAuthedController
         $this->_decItems($costItems);
         $event = [
             'name' => LogService::SHOP_BUY_ITEM_DAILY,
-            'val' => $costItems['item_num']
+            'val' => $costItems[0]['item_num']
         ];
         LogService::consumeDiamond($event);
 
@@ -1915,7 +1914,7 @@ class ShopController extends BaseAuthedController
             $this->_decItems($costItems);
             $event = [
                 'name' => LogService::SHOP_BUY_ITEM_BLIND_BOX,
-                'val' => $costItems['item_num']
+                'val' => $costItems[0]['item_num']
             ];
             LogService::consumeDiamond($event);
         }