diff --git a/admin/templates/LeftAndMain.ss b/admin/templates/LeftAndMain.ss
index b54cb335d..f668b2c7e 100644
--- a/admin/templates/LeftAndMain.ss
+++ b/admin/templates/LeftAndMain.ss
@@ -1,5 +1,5 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml">
+<!DOCTYPE html>
+<html>
 <head>
 <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
 <meta http-equiv="Content-language" content="$i18nLocale" />
