4 files changed, 4 insertions, 0 deletions
diff --git a/railties/lib/rails/engine/commands.rb b/railties/lib/rails/engine/commands.rb
index b9ef63243a..493b6988a5 100644
--- a/railties/lib/rails/engine/commands.rb
+++ b/railties/lib/rails/engine/commands.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 unless defined?(APP_PATH)
   if File.exist?(File.expand_path("test/dummy/config/application.rb", ENGINE_ROOT))
     APP_PATH = File.expand_path("test/dummy/config/application", ENGINE_ROOT)
diff --git a/railties/lib/rails/engine/configuration.rb b/railties/lib/rails/engine/configuration.rb
index 0c40173c38..40bafc4078 100644
--- a/railties/lib/rails/engine/configuration.rb
+++ b/railties/lib/rails/engine/configuration.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rails/railtie/configuration"
 
 module Rails
diff --git a/railties/lib/rails/engine/railties.rb b/railties/lib/rails/engine/railties.rb
index 9969a1475d..f34a46db89 100644
--- a/railties/lib/rails/engine/railties.rb
+++ b/railties/lib/rails/engine/railties.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Rails
   class Engine < Railtie
     class Railties
diff --git a/railties/lib/rails/engine/updater.rb b/railties/lib/rails/engine/updater.rb
index 2ecf994a5c..0ee72a83f0 100644
--- a/railties/lib/rails/engine/updater.rb
+++ b/railties/lib/rails/engine/updater.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rails/generators"
 require "rails/generators/rails/plugin/plugin_generator"