diff --git a/src/_h5ai/header.html b/src/_h5ai/header.html
index ab84245f..ef671b42 100644
--- a/src/_h5ai/header.html
+++ b/src/_h5ai/header.html
@@ -2,7 +2,7 @@
 <!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en"> <![endif]-->
 <!--[if IE 7]>    <html class="no-js ie7 oldie" lang="en"> <![endif]-->
 <!--[if IE 8]>    <html class="no-js ie8 oldie" lang="en"> <![endif]-->
-<!--[if gt IE 8]><!--> <html class="no-js" lang="en"> <!--<![endif]-->
+<!--[if gt IE 8]><!--> <html class="h5ai-js no-js" lang="en"> <!--<![endif]-->
 <head>
 	<meta charset="utf-8">
 	<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
diff --git a/src/_h5ai/header.php b/src/_h5ai/header.php
index c3c2ef59..c4dd2dd0 100644
--- a/src/_h5ai/header.php
+++ b/src/_h5ai/header.php
@@ -2,7 +2,7 @@
 <!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en"> <![endif]-->
 <!--[if IE 7]>    <html class="no-js ie7 oldie" lang="en"> <![endif]-->
 <!--[if IE 8]>    <html class="no-js ie8 oldie" lang="en"> <![endif]-->
-<!--[if gt IE 8]><!--> <html class="no-js" lang="en"> <!--<![endif]-->
+<!--[if gt IE 8]><!--> <html class="h5ai-php no-js" lang="en"> <!--<![endif]-->
 <?php include "php/main.php"; ?>
 <head>
 	<meta charset="utf-8">
