diff --git a/libraries/classes/Database/Qbe.php b/libraries/classes/Database/Qbe.php
index 338eb4b7dc4..3e46a9aed33 100644
--- a/libraries/classes/Database/Qbe.php
+++ b/libraries/classes/Database/Qbe.php
@@ -231,7 +231,7 @@ class Qbe
      * Current search
      *
      * @access private
-     * @var ?SavedSearches
+     * @var SavedSearches|null
      */
     private $currentSearch = null;
 
@@ -250,7 +250,7 @@ class Qbe
      * @param DatabaseInterface $dbi             DatabaseInterface object
      * @param string            $dbname          Database name
      * @param array             $savedSearchList List of saved searches
-     * @param ?SavedSearches    $currentSearch   Current search id
+     * @param SavedSearches|null    $currentSearch   Current search id
      */
     public function __construct(
         Relation $relation,