diff --git a/docs/_includes/header.html b/docs/_includes/header.html
index a47837b493a15233ef4544104369608342d08eb0..f738b9146790f8266ac27b8247d794557f946009 100644
--- a/docs/_includes/header.html
+++ b/docs/_includes/header.html
@@ -14,7 +14,7 @@
 <!-- Bootstrap core CSS -->
 <link href="/assets/css/bootstrap.css" rel="stylesheet">
 
-{% if page.layout == default %}
+{% if page.layout == "default" %}
 <!-- Documentation extras -->
 <link href="/assets/css/docs.css" rel="stylesheet">
 <link href="/assets/css/pygments-manni.css" rel="stylesheet">