diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index 39ccbc2..6088726 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -1166,7 +1166,7 @@ function comment_node_predelete(EntityInterface $node) {
 /**
  * Implements hook_node_update_index().
  */
-function comment_node_update_index(EntityInterface $node, $langcode) {
+function comment_node_update_index(EntityInterface $node) {
   $index_comments = &drupal_static(__FUNCTION__);
 
   if ($index_comments === NULL) {
diff --git a/core/modules/node/node.api.php b/core/modules/node/node.api.php
index c814f0e..9a6959c 100644
--- a/core/modules/node/node.api.php
+++ b/core/modules/node/node.api.php
@@ -691,15 +691,13 @@ function hook_node_update(\Drupal\Core\Entity\EntityInterface $node) {
  *
  * @param \Drupal\Core\Entity\EntityInterface $node
  *   The node being indexed.
- * @param $langcode
- *   Language code of the variant of the node being indexed.
  *
  * @return string
  *   Additional node information to be indexed.
  *
  * @ingroup node_api_hooks
  */
-function hook_node_update_index(\Drupal\Core\Entity\EntityInterface $node, $langcode) {
+function hook_node_update_index(\Drupal\Core\Entity\EntityInterface $node) {
   $text = '';
   $comments = db_query('SELECT subject, comment, format FROM {comment} WHERE nid = :nid AND status = :status', array(':nid' => $node->id(), ':status' => COMMENT_PUBLISHED));
   foreach ($comments as $comment) {