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-rw-r--r--activerecord/lib/active_record/inheritance.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/inheritance.rb b/activerecord/lib/active_record/inheritance.rb
index 6ab67fdece..e630897a4b 100644
--- a/activerecord/lib/active_record/inheritance.rb
+++ b/activerecord/lib/active_record/inheritance.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/hash/indifferent_access'
+
module ActiveRecord
module Inheritance
extend ActiveSupport::Concern