diff --git a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
index 1a7944780be5017a03208c04844f524a2644d216..9934f5547aea747e94fd7b1f5d8c469e8db43b19 100644
--- a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
+++ b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
@@ -247,14 +247,12 @@ def handle_model(record)
           args  = []
 
           model = record.to_model
-          name = if model.persisted?
-                   args << model
-                   model.model_name.singular_route_key
-                 else
-                   @key_strategy.call model.model_name
-                 end
-
-          named_route = get_method_for_string name
+          named_route = if model.persisted?
+                          args << model
+                          get_method_for_string model.model_name.singular_route_key
+                        else
+                          get_method_for_class model
+                        end
 
           [named_route, args]
         end