diff --git a/core/includes/batch.inc b/core/includes/batch.inc
index 358613efb4..402f195c2f 100644
--- a/core/includes/batch.inc
+++ b/core/includes/batch.inc
@@ -551,7 +551,7 @@ function _batch_finished() {
  * @see drupal_register_shutdown_function()
  */
 function _batch_shutdown() {
-  if ($batch = batch_get() && _batch_needs_update()) {
+  if (($batch = batch_get()) && _batch_needs_update()) {
     \Drupal::service('batch.storage')->update($batch);
   }
 }