--- a/wp/wp-admin/ms-sites.php	Tue Oct 22 16:11:46 2019 +0200
+++ b/wp/wp-admin/ms-sites.php	Tue Dec 15 13:49:49 2020 +0100
@@ -7,7 +7,7 @@
  * @since 3.0.0
  */
 
-require_once( dirname( __FILE__ ) . '/admin.php' );
+require_once __DIR__ . '/admin.php';
 
 wp_redirect( network_admin_url( 'sites.php' ) );
 exit;