diff --git a/core/lib/Thelia/Model/CartItem.php b/core/lib/Thelia/Model/CartItem.php
index cfe174989..01381f267 100644
--- a/core/lib/Thelia/Model/CartItem.php
+++ b/core/lib/Thelia/Model/CartItem.php
@@ -61,7 +61,7 @@ class CartItem extends BaseCartItem
             }
         }
 
-        $this->setQuantity($currentQuantity);
+        $this->setQuantity($newQuantity);
 
         return $this;
     }