diff --git a/app/Service/v3/Implementations/ShopCartService.php b/app/Service/v3/Implementations/ShopCartService.php
index 3310060..478308c 100644
--- a/app/Service/v3/Implementations/ShopCartService.php
+++ b/app/Service/v3/Implementations/ShopCartService.php
@@ -81,7 +81,7 @@ class ShopCartService implements ShopCartServiceInterface
         $ShoppingCart = ShoppingCart::query()->where([
             ['user_id','=',$userId],
             ['goods_id','=',$goodsId],
-            ['activity_type','=',$activity],
+            ['activity_type','=',$activityType],
         ])
             ->select('num')
             ->first();