diff --git a/sysadm/_templates/layout.html b/sysadm/_templates/layout.html
--- a/sysadm/_templates/layout.html
+++ b/sysadm/_templates/layout.html
@@ -1,3 +1,5 @@
+{% extends "!layout.html" %}
+
 {# copied from sphinx_rtd_theme/layout.html, with the extra "Development Documentation" link #}
 {%- block menu %}
   {%- set toctree = toctree(maxdepth=theme_navigation_depth|int,