diff --git a/mirroring.php b/mirroring.php
index a49a98255..ad0237f7e 100644
--- a/mirroring.php
+++ b/mirroring.php
@@ -200,6 +200,7 @@ europe.rsync.php.net
      ServerName xx.php.net
      ServerAlias the.cname.you.set.up.example.com www.xx.php.net
      ServerAdmin yourname@example.com
+     UseCanonicalName On
      
      # Webroot of PHP mirror site
      DocumentRoot /www/htdocs/phpweb