diff --git a/assets/index.ejs b/assets/index.ejs
index b6fc06c80..d47e0b9ec 100644
--- a/assets/index.ejs
+++ b/assets/index.ejs
@@ -36,6 +36,7 @@
     <div id="root"></div>
     <!-- Environment variables -->
     <script>
+      window.theme;
       window.recentActivityRefreshInterval;
       window.recentActivityExpirationLimit;
       window.recentActivityDocumentationURL;