1 files changed, 1 insertions, 2 deletions
diff --git a/railties/lib/rails/application.rb b/railties/lib/rails/application.rb
index 455ceed5f8..2d5aa9d952 100644
--- a/railties/lib/rails/application.rb
+++ b/railties/lib/rails/application.rb
@@ -1,6 +1,5 @@
 require 'fileutils'
 require 'active_support/core_ext/object/blank'
-# FIXME remove DummyKeyGenerator and this require in 4.1
 require 'active_support/key_generator'
 require 'rails/engine'
 
@@ -112,7 +111,7 @@ module Rails
           key_generator = ActiveSupport::KeyGenerator.new(config.secret_key_base, iterations: 1000)
           ActiveSupport::CachingKeyGenerator.new(key_generator)
         else
-          ActiveSupport::DummyKeyGenerator.new(config.secret_token)
+          ActiveSupport::LegacyKeyGenerator.new(config.secret_token)
         end
       end
     end