diff --git a/README.md b/README.md
index 51f5d47e1..920df7e2e 100644
--- a/README.md
+++ b/README.md
@@ -199,14 +199,6 @@ This will create the Shopify engine routes under the specified subpath, as a res
     callback_path: '/nested/auth/shopify/callback'
 ```
 
-To use named routes with the engine so that it can route between the application and the engine's routes it should be prefixed with `main_app` or `shopify_app`.
-
-```ruby
-main_app.login_path # For a named login route on the rails app.
-
-shopify_app.login_path # For the shopify app store login route.
-```
-
 Managing Api Keys
 -----------------
 
diff --git a/lib/shopify_app/controller_concerns/login_protection.rb b/lib/shopify_app/controller_concerns/login_protection.rb
index 07f576ab5..6182f2b0a 100644
--- a/lib/shopify_app/controller_concerns/login_protection.rb
+++ b/lib/shopify_app/controller_concerns/login_protection.rb
@@ -54,7 +54,7 @@ def close_session
     def main_or_engine_login_url(params = {})
       main_app.login_url(params)
     rescue NoMethodError
-      shopify_app.login_url(params)
+      shopify_app_engine.login_url(host: "https://#{request.host}", params: params)
     end
 
     def fullpage_redirect_to(url)
@@ -115,5 +115,10 @@ def sanitize_shop_param(params)
       ShopifyApp::Utils.sanitize_shop_domain(params[:shop])
     end
 
+    private
+
+    def shopify_app_engine
+      ShopifyApp::Engine.routes.url_helpers
+    end
   end
 end