diff --git a/includes/handlers/pay_method_gateway.inc b/includes/handlers/pay_method_gateway.inc
index 1951745..020fd05 100644
--- a/includes/handlers/pay_method_gateway.inc
+++ b/includes/handlers/pay_method_gateway.inc
@@ -527,6 +527,8 @@ class pay_method_gateway extends pay_method {
       '#pre_render' => array('pay_element_set_required'),
       '#attributes' => array('title' => t('Expiration year')),
     );
+    
+    drupal_alter('pay_method_form', $method_form);
 
     // Add this method_form to the expected place on the parent form.
     $form[$group]['pay_method'][$this->pmid] = $method_form;