diff --git a/src/furo/theme/furo/base.html b/src/furo/theme/furo/base.html
index 77ff1f2d7..14a39b074 100644
--- a/src/furo/theme/furo/base.html
+++ b/src/furo/theme/furo/base.html
@@ -1,5 +1,5 @@
 <!doctype html>
-<html class="no-js"{% if language is not none %} lang="{{ language }}"{% endif %}>
+<html class="no-js"{% if language is not none %} lang="{{ language }}"{% endif %} data-content_root="{{ content_root }}">
   <head>
     {%- block site_meta -%}
     <meta charset="utf-8"/>
