diff --git a/sphinx_rtd_theme/layout.html b/sphinx_rtd_theme/layout.html
index c8cab2560..ca16d1662 100644
--- a/sphinx_rtd_theme/layout.html
+++ b/sphinx_rtd_theme/layout.html
@@ -57,7 +57,7 @@
   {%- if not embedded %}
   {# XXX Sphinx 1.8.0 made this an external js-file, quick fix until we refactor the template to inherert more blocks directly from sphinx #}
     {% if sphinx_version >= "1.8.0" %}
-      <script type="text/javascript" id="documentation_options" data-url_root="{{ pathto('', 1) }}" src="{{ pathto('_static/documentation_options.js', 1) }}"></script>
+      <script type="text/javascript" id="documentation_options" data-url_root="{{ url_root }}" src="{{ pathto('_static/documentation_options.js', 1) }}"></script>
       {%- for scriptfile in script_files %}
         {{ js_tag(scriptfile) }}
       {%- endfor %}