diff --git a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
index ea1601fc5a3ce..c8baf7a324ce5 100644
--- a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
+++ b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
@@ -111,7 +111,6 @@ def polymorphic_url(record_or_hash_or_array, options = {})
           if record_or_hash_or_array.first.is_a?(ActionDispatch::Routing::RoutesProxy)
             recipient = record_or_hash_or_array.shift
           end
-          record_or_hash_or_array = record_or_hash_or_array[0] if record_or_hash_or_array.size == 1
         end
 
         args = Array === record_or_hash_or_array ?