diff --git a/app/views/admin/registered_sites/_form.html.erb b/app/views/admin/registered_sites/_form.html.erb
index 80f67f8..d0b6219 100644
--- a/app/views/admin/registered_sites/_form.html.erb
+++ b/app/views/admin/registered_sites/_form.html.erb
@@ -32,6 +32,7 @@
         <label class="control-label muted"><%= t(:domain) %></label>
         <div class="controls">
           <%= f.text_field :site_domain %>
+          <span class="help-inline alert alert-error">Please do not use <b>http://</b> in the url. Just input the domain of the website without <b>http://</b>.</span>
         </div>
       </div>