diff --git a/data/interfaces/default/newsletter_preview.html b/data/interfaces/default/newsletter_preview.html
index cb48e641..22b2e13a 100644
--- a/data/interfaces/default/newsletter_preview.html
+++ b/data/interfaces/default/newsletter_preview.html
@@ -32,7 +32,7 @@
 <script>
 $(document).ready(function () {
     var frame = $('<iframe></iframe>', {
-        src: '${http_root}real_newsletter?${urllib.urlencode(kwargs) | n}',
+        src: 'real_newsletter?${urllib.urlencode(kwargs) | n}',
         frameborder: '0',
         style: 'display: none; height: 100vh; width: 100vw;'
     });