diff --git a/core/modules/node/node.admin.inc b/core/modules/node/node.admin.inc
index 801ae81..f20c21c 100644
--- a/core/modules/node/node.admin.inc
+++ b/core/modules/node/node.admin.inc
@@ -103,8 +103,8 @@ function _node_mass_update_helper(NodeInterface $node, array $updates, $langcode
  * @param array $updates
  *   Associative array of updates.
  * @param string $langcode
- *   (optional) The language updates should be applied to. If none is specified
- *   all available languages are processed.
+ *   The language updates should be applied to. If none is specified all
+ *   available languages are processed.
  * @param bool $load
  *   TRUE if $nodes contains an array of node IDs to be loaded, FALSE if it
  *   contains fully loaded nodes.
@@ -114,7 +114,7 @@ function _node_mass_update_helper(NodeInterface $node, array $updates, $langcode
  * @param array $context
  *   An array of contextual key/values.
  */
-function _node_mass_update_batch_process(array $nodes, array $updates, $langcode = NULL, $load, $revisions, array &$context) {
+function _node_mass_update_batch_process(array $nodes, array $updates, $langcode, $load, $revisions, array &$context) {
   if (!isset($context['sandbox']['progress'])) {
     $context['sandbox']['progress'] = 0;
     $context['sandbox']['max'] = count($nodes);