diff --git a/lib/util.php b/lib/util.php
index 58ae330a9d..8a05a346f0 100644
--- a/lib/util.php
+++ b/lib/util.php
@@ -71,8 +71,8 @@ function common_show_header($pagetitle) {
 	header('Content-Type: application/xhtml+xml');
 	
 	$xw = new XMLWriter();
-	$xw->setIndent(true);
 	$xw->openURI('php://output');
+	$xw->setIndent(true);
 	$xw->startDocument('1.0', 'UTF-8');
 	$xw->writeDTD('html', '-//W3C//DTD XHTML 1.0 Strict//EN',
 				  'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd');