diff --git a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
index 55f40fe204555fe7129a3a9c0bda88d17deadd2c..dd2cbdcddcff01c2347025900a973b17b12626a8 100644
--- a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
+++ b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
@@ -135,7 +135,9 @@ def polymorphic_url(record_or_hash_or_array, options = {})
         named_route = build_named_route_call(record_or_hash_or_array, record, inflection, options)
 
         url_options = options.except(:action, :routing_type)
-        args << url_options
+        unless url_options.empty?
+          args << url_options
+        end
 
         args.collect! { |a| convert_to_model(a) }