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-rw-r--r--actionpack/lib/action_controller/caching/pages.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actionpack/lib/action_controller/caching/pages.rb b/actionpack/lib/action_controller/caching/pages.rb
index 3e57d2c236..f305ed30fa 100644
--- a/actionpack/lib/action_controller/caching/pages.rb
+++ b/actionpack/lib/action_controller/caching/pages.rb
@@ -1,4 +1,5 @@
require 'fileutils'
+require 'active_support/concern'
require 'active_support/core_ext/class/attribute_accessors'
module ActionController #:nodoc: