diff --git a/sphinx_rtd_theme/searchbox.html b/sphinx_rtd_theme/searchbox.html
index bc3ee5f0d..171df1dcd 100644
--- a/sphinx_rtd_theme/searchbox.html
+++ b/sphinx_rtd_theme/searchbox.html
@@ -1,5 +1,5 @@
 {%- if 'singlehtml' not in builder %}
-<div role="search">
+<div id="searchbox" role="search">
   <form id="rtd-search-form" class="wy-form" action="{{ pathto('search') }}" method="get">
     <input type="text" name="q" placeholder="{{ _('Search docs') }}" />
     <input type="hidden" name="check_keywords" value="yes" />