diff --git a/config/environment.rb b/config/environment.rb
index 9a3bf4b1d..86a2eb3a5 100644
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -55,3 +55,5 @@ Rails::Initializer.run do |config|
   # It will automatically turn deliveries on
   config.action_mailer.perform_deliveries = false
 end
+
+ActionController::AbstractRequest.relative_url_root = "/rdm"