diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index 339e2b7c4a..5f54ea130b 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -1,5 +1,4 @@
 require 'action_dispatch/journey'
-require 'forwardable'
 require 'active_support/concern'
 require 'active_support/core_ext/object/to_query'
 require 'active_support/core_ext/hash/slice'