diff --git a/lib/sassc/rails/railtie.rb b/lib/sassc/rails/railtie.rb
index 407635c..142b19f 100644
--- a/lib/sassc/rails/railtie.rb
+++ b/lib/sassc/rails/railtie.rb
@@ -28,7 +28,7 @@ class Railtie < ::Rails::Railtie
 
     # Remove the sass middleware if it gets inadvertently enabled by applications.
     config.after_initialize do |app|
-      app.config.middleware.delete(Sass::Plugin::Rack) if defined?(Sass::Plugin::Rack)
+      app.config.app_middleware.delete(Sass::Plugin::Rack) if defined?(Sass::Plugin::Rack)
     end
 
     initializer :setup_sass, group: :all do |app|