diff --git a/sites/all/themes/unl_wdn/html.tpl.php b/sites/all/themes/unl_wdn/html.tpl.php
index 9d6a43660d6ca01d22a95d23279456696a3dbd94..e289f6a0637ee2b1076733c1f8a4bae5951aa7c4 100644
--- a/sites/all/themes/unl_wdn/html.tpl.php
+++ b/sites/all/themes/unl_wdn/html.tpl.php
@@ -60,9 +60,11 @@ if (theme_get_setting('wdn_beta')) {
if (module_exists('rdf')) {
$html = str_replace(
array('<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">',
+ '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">',
'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">',
'<head>'),
array('<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="'.$language->language.'" version="XHTML+RDFa 1.0" dir="'.$language->dir.'" '.$rdf_namespaces.'>'.PHP_EOL,
+ '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="'.$language->language.'" version="XHTML+RDFa 1.0" dir="'.$language->dir.'" '.$rdf_namespaces.'>'.PHP_EOL,
'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">',
'<head profile="'.$grddl_profile.'">'),
$html);