diff --git a/basic_cart.module b/basic_cart.module
index 964df14..b0fe902 100644
--- a/basic_cart.module
+++ b/basic_cart.module
@@ -323,7 +323,7 @@ function basic_cart_field_formatter_view($entity_type, $entity, $field, $instanc
       break;
       
     case 'basic_cart_add_to_cart_quantity':
-      $element = drupal_get_form('basic_cart_add_to_cart_quantity_form', $entity->nid);
+      $element[] = drupal_get_form('basic_cart_add_to_cart_quantity_form', $entity->nid);
       break;
 
     case 'basic_cart_price':
@@ -462,4 +462,4 @@ function basic_cart_get_fields() {
       'description' => '',
     ),
   );
-}
\ No newline at end of file
+}