diff --git a/core/lib/Drupal/Core/Config/ConfigInstallerInterface.php b/core/lib/Drupal/Core/Config/ConfigInstallerInterface.php
index 43d9e86224af44c4714abd8e2ea97ed62b2499db..13e5b0ed2683f8f4db7eedd57d71c1770832fc6f 100644
--- a/core/lib/Drupal/Core/Config/ConfigInstallerInterface.php
+++ b/core/lib/Drupal/Core/Config/ConfigInstallerInterface.php
@@ -71,6 +71,8 @@ public function resetSourceStorage();
    *
    * @param bool $status
    *   The status of the sync flag.
+   *
+   * @return $this
    */
   public function setSyncing($status);