diff --git a/src/Message/RestCompletePurchaseResponse.php b/src/Message/RestCompletePurchaseResponse.php
index 4123aa7..1a8a9b4 100644
--- a/src/Message/RestCompletePurchaseResponse.php
+++ b/src/Message/RestCompletePurchaseResponse.php
@@ -27,4 +27,12 @@ public function isSuccessful()
     {
         return $this->getPaymentStatus() == 'completed';
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isPending()
+    {
+        return parent::isInitialized();
+    }
 }