--- a/app/controllers/security.rb
+++ b/app/controllers/security.rb
@@ -10,7 +10,7 @@ module Security
     # Ensure somebody is logged in.  Takes the same options as
     # +before_filter+.
     def authenticate(options = {})
-      before_filter options.dup { |controller| controller.send(:authenticate) }
+      before_filter(options.dup) { |controller| controller.send(:authenticate) }
     end