diff --git a/core/includes/update.inc b/core/includes/update.inc
index 27a965a..dea7f6d 100644
--- a/core/includes/update.inc
+++ b/core/includes/update.inc
@@ -858,7 +858,7 @@ function update_language_list($flags = LanguageInterface::STATE_CONFIGURABLE) {
   if ($flags & LanguageInterface::STATE_SITE_DEFAULT) {
     $default = isset($default) ? $default : \Drupal::languageManager()->getDefaultLanguage();
     // Rename the default language.
-    $default->name = t("Site's default language (@lang_name)", array('@lang_name' => $default->name));
+    $default->setName(t("Site's default language (@lang_name)", array('@lang_name' => $default->getName())));
     $filtered_languages['site_default'] = $default;
   }