1 files changed, 2 insertions, 7 deletions
diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index 22a1a15bf5..401c4ff56b 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -159,13 +159,8 @@ module Rails
     end
 
     def call(env)
-      app.call(env.reverse_merge!(env_defaults))
-    end
-
-    def env_defaults
-      @env_defaults ||= {
-        "action_dispatch.routes" => routes
-      }
+      env["action_dispatch.routes"] = routes
+      app.call(env)
     end
 
     def routes