diff --git a/src/Cart.php b/src/Cart.php
index c097106..56f9c68 100644
--- a/src/Cart.php
+++ b/src/Cart.php
@@ -95,7 +95,7 @@ public function unserialize($serialized)
 
         foreach ($data['items'] as $id => $product) {
             if (isset($data['quantities'][$id])) {
-                $this->addProduct($product, $data['quantities'][$id]);
+                $this->addItem($product, $data['quantities'][$id]);
             }
         }
     }