diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index 66b9a282..20ae191a 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -209,7 +209,7 @@ private
   end
 
   def login_without_softapplication
-    referer = request.headers["Referer"]
+    referer = request.headers['Referer']
     require_login unless referer =~ /softapplication/
-    end
+  end
 end