diff --git a/app/views/seminars/show.html.erb b/app/views/seminars/show.html.erb
index 167023f..b461a63 100644
--- a/app/views/seminars/show.html.erb
+++ b/app/views/seminars/show.html.erb
@@ -7,7 +7,7 @@
   if data["prefix_url"]
     prefix_url = data["prefix_url"]
   else
-    prefix_url = OrbitHelper.url_to_show
+    prefix_url = OrbitHelper.url_to_show(@seminar.to_param)
   end
 %>
 <% if !@seminar.registration_status.blank? and @seminar.signup_start_date < @time_now and ( @seminar.signup_end_date.nil? or @seminar.signup_end_date+1 > @time_now ) %>