diff --git a/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkFormatter.php b/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkFormatter.php
index 111ce34..d275143 100644
--- a/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkFormatter.php
+++ b/core/modules/link/lib/Drupal/link/Plugin/Field/FieldFormatter/LinkFormatter.php
@@ -137,7 +137,7 @@ public function viewElements(FieldItemListInterface $items) {
 
       if (!empty($settings['url_only']) && !empty($settings['url_plain'])) {
         $element[$delta] = array(
-          '#markup' => check_plain($link_title),
+          '#markup' => \Drupal\Component\Utility\String::checkPlain($link_title),
         );
       }
       else {
diff --git a/core/modules/link/link.module b/core/modules/link/link.module
index 24c6286..2b6cbf4 100644
--- a/core/modules/link/link.module
+++ b/core/modules/link/link.module
@@ -60,7 +60,7 @@ function link_theme() {
  */
 function template_preprocess_link_formatter_link_separate(&$variables) {
   if (!empty($variables['title'])) {
-    $variables['title'] = check_plain($variables['title']);
+    $variables['title'] = \Drupal\Component\Utility\String::checkPlain($variables['title']);
   }
   $variables['link'] = l($variables['url_title'], $variables['href'], $variables['options']);
 }