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-rw-r--r--actionpack/lib/abstract_controller.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actionpack/lib/abstract_controller.rb b/actionpack/lib/abstract_controller.rb
index c565c940a1..f8fc79936f 100644
--- a/actionpack/lib/abstract_controller.rb
+++ b/actionpack/lib/abstract_controller.rb
@@ -2,6 +2,7 @@ activesupport_path = File.expand_path('../../../activesupport/lib', __FILE__)
$:.unshift(activesupport_path) if File.directory?(activesupport_path) && !$:.include?(activesupport_path)
require 'action_pack'
+require 'active_support/concern'
require 'active_support/ruby/shim'
require 'active_support/dependencies/autoload'
require 'active_support/core_ext/class/attribute'