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-rw-r--r--activerecord/lib/active_record/locking/optimistic.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/locking/optimistic.rb b/activerecord/lib/active_record/locking/optimistic.rb
index cf4f8864c6..cec5ca3324 100644
--- a/activerecord/lib/active_record/locking/optimistic.rb
+++ b/activerecord/lib/active_record/locking/optimistic.rb
@@ -42,7 +42,7 @@ module ActiveRecord
# To override the name of the lock_version column, invoke the <tt>set_locking_column</tt> method.
# This method uses the same syntax as <tt>set_table_name</tt>
module Optimistic
- extend ActiveSupport::DependencyModule
+ extend ActiveSupport::Concern
included do
cattr_accessor :lock_optimistically, :instance_writer => false