1 files changed, 3 insertions, 1 deletions
diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index 65d6a5eb1e..ce04f0b08a 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -395,9 +395,11 @@ module ActionDispatch
         return if MountedHelpers.method_defined?(name)
 
         routes = self
+        helpers = routes.url_helpers
+
         MountedHelpers.class_eval do
           define_method "_#{name}" do
-            RoutesProxy.new(routes, _routes_context)
+            RoutesProxy.new(routes, _routes_context, helpers)
           end
         end