diff --git a/pywb/static/wb_frame.js b/pywb/static/wb_frame.js
index 79642db1..640b3e88 100644
--- a/pywb/static/wb_frame.js
+++ b/pywb/static/wb_frame.js
@@ -38,7 +38,7 @@ function make_inner_url(url, ts)
     if (ts) {
         return wbinfo.prefix + ts + "/" + url;
     } else {
-        return wbinfo.prefix + "/" + url;
+        return wbinfo.prefix + url;
     }
 }