diff --git a/src/Cart.php b/src/Cart.php
index cbb2699..51e2add 100644
--- a/src/Cart.php
+++ b/src/Cart.php
@@ -710,7 +710,7 @@ class Cart
             $cartItem = CartItem::fromArray($id);
             $cartItem->setQuantity($id['qty']);
         } else {
-            $cartItem = CartItem::fromAttributes($id, $name, $price, $options);
+            $cartItem = CartItem::fromAttributes($id, $name, $price, null, $options);
             $cartItem->setQuantity($qty);
         }