diff --git a/wp-admin/auth.php b/wp-admin/auth.php
index 269a3b970a..957f2114fe 100644
--- a/wp-admin/auth.php
+++ b/wp-admin/auth.php
@@ -1,7 +1,8 @@
 <?php
 require_once('../wp-config.php');
 
-if ( !empty($_COOKIE['wordpressuser_' . COOKIEHASH]) && !wp_login($_COOKIE['wordpressuser_' . COOKIEHASH], $_COOKIE['wordpresspass_' . COOKIEHASH], true) ) {
+if ( (!empty($_COOKIE['wordpressuser_' . COOKIEHASH]) && !wp_login($_COOKIE['wordpressuser_' . COOKIEHASH], $_COOKIE['wordpresspass_' . COOKIEHASH], true))
+	|| (empty($_COOKIE['wordpressuser_' . COOKIEHASH])) ) {
 	header('Expires: Wed, 5 Jun 1979 23:41:00 GMT'); // Michel's birthday
 	header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
 	header('Cache-Control: no-cache, must-revalidate');
@@ -11,4 +12,4 @@ if ( !empty($_COOKIE['wordpressuser_' . COOKIEHASH]) && !wp_login($_COOKIE['word
 	exit();
 }
 
-?>
\ No newline at end of file
+?>