diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 7ae4ad5..2405ea1 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1983,7 +1983,7 @@ function drupal_pre_render_html(array $element) {
     $type = theme_get_setting('favicon.mimetype');
     $element['#attached']['drupal_add_html_head_link'][][] = array(
       'rel' => 'shortcut icon',
-      'href' => Url::stripDangerousProtocols($favicon),
+      'href' => UrlHelper::stripDangerousProtocols($favicon),
       'type' => $type,
     );
   }