diff --git a/core/lib/Drupal/Core/Page/HtmlFragment.php b/core/lib/Drupal/Core/Page/HtmlFragment.php
index 18f587a..ad7bd56 100644
--- a/core/lib/Drupal/Core/Page/HtmlFragment.php
+++ b/core/lib/Drupal/Core/Page/HtmlFragment.php
@@ -174,7 +174,7 @@ public function getContent() {
    * @param string $title
    *   Value to assign to the page title.
    * @param int $output
-   *   (optional) normally should be left as Title::CHECK_PLAIN. Only set to
+   *   (optional) normally should be left as Title::FILTER_XSS_ADMIN. Only set to
    *   Title::PASS_THROUGH if you have already removed any possibly dangerous
    *   code from $title using a function like
    *   \Drupal\Component\Utility\String::checkPlain() or
@@ -183,7 +183,7 @@ public function getContent() {
    *
    * @return $this
    */
-  public function setTitle($title, $output = Title::CHECK_PLAIN) {
+  public function setTitle($title, $output = Title::FILTER_XSS_ADMIN) {
     if ($output == Title::CHECK_PLAIN) {
       $this->title = String::checkPlain($title);
     }