diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index c118c72440..c27f06c686 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -731,6 +731,7 @@ module ActionDispatch
             end
           elsif resource_method_scope?
             path = path_for_custom_action
+            options[:action] ||= action
             options[:as] = name_for_action(options[:as]) if options[:as]
             args.push(options)
 
diff --git a/actionpack/test/dispatch/routing_test.rb b/actionpack/test/dispatch/routing_test.rb
index 3f090b7254..4dabe1531c 100644
--- a/actionpack/test/dispatch/routing_test.rb
+++ b/actionpack/test/dispatch/routing_test.rb
@@ -128,7 +128,7 @@ class TestRoutingMapper < ActionDispatch::IntegrationTest
           end
 
           member do
-            get  :some_path_with_name
+            get  'some_path_with_name'
             put  :accessible_projects
             post :resend, :generate_new_password
           end