diff --git a/header.inc.php.template b/header.inc.php.template
index 7e7765eac6..8bd68dcc3c 100644
--- a/header.inc.php.template
+++ b/header.inc.php.template
@@ -85,7 +85,8 @@ $GLOBALS['egw_info']['server']['versions']['header'] = '1.29';
 
 if(!isset($GLOBALS['egw_info']['flags']['noapi']) || !$GLOBALS['egw_info']['flags']['noapi'])
 {
-	if (substr($_SERVER['SCRIPT_NAME'],-7) != 'dav.php' && substr($_GET['menuaction'],-10) != '_hooks.log')	// dont do it for webdav/groupdav, as we can not safely switch it off again
+	if (substr($_SERVER['SCRIPT_NAME'],-7) != 'dav.php' &&	// dont do it for webdav/groupdav, as we can not safely switch it off again
+		(!isset($_GET['menuaction']) || substr($_GET['menuaction'],-10) != '_hooks.log'))
 	{
 		ob_start();	// to prevent error messages to be send before our headers
 	}