diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index e8d6a23..4bbe413 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -362,7 +362,7 @@ public static function moduleHandler() {
    * @return \Drupal\Core\Theme\ThemeNegotiator
    */
   public static function themeNegotiator() {
-    return static::$container->get('theme.negotiator')->getActiveTheme();
+    return static::$container->get('theme.negotiator');
   }
 
   /**