diff --git a/lib/PayPal/Api/CartBase.php b/lib/PayPal/Api/CartBase.php
index 86f1f20..1f7ef1e 100644
--- a/lib/PayPal/Api/CartBase.php
+++ b/lib/PayPal/Api/CartBase.php
@@ -290,7 +290,7 @@ class CartBase extends PayPalModel
      */
     public function setItemList($item_list)
     {
-        $this->item_list = array_values($item_list);
+        $this->item_list = $item_list;
         return $this;
     }
 
diff --git a/lib/PayPal/Api/ItemList.php b/lib/PayPal/Api/ItemList.php
index 262047a..63ff054 100644
--- a/lib/PayPal/Api/ItemList.php
+++ b/lib/PayPal/Api/ItemList.php
@@ -27,7 +27,7 @@ class ItemList extends PayPalModel
      */
     public function setItems($items)
     {
-        $this->items = $items;
+        $this->items = array_values($items);
         return $this;
     }