diff --git a/lib/tpl/index.php b/lib/tpl/index.php
index 20abea20caa3cc1a0598a0bcbe7da46959c15371..0273e567803fb59bf0d1dffe6432b6a912e5f21f 100644
--- a/lib/tpl/index.php
+++ b/lib/tpl/index.php
@@ -9,7 +9,7 @@
* @author Anika Henke <anika@selfthinker.org>
*/
if(!defined('DOKU_INC')) define('DOKU_INC',dirname(__FILE__).'/../../');
-if(!define('NOSESSION')) define('NOSESSION',1);
+if(!defined('NOSESSION')) define('NOSESSION',1);
require_once(DOKU_INC.'inc/init.php');
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"