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-rw-r--r--activemodel/lib/active_model/dirty.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activemodel/lib/active_model/dirty.rb b/activemodel/lib/active_model/dirty.rb
index 6e67cd2285..b89b98feed 100644
--- a/activemodel/lib/active_model/dirty.rb
+++ b/activemodel/lib/active_model/dirty.rb
@@ -139,7 +139,7 @@ module ActiveModel
# person.name = 'robert'
# person.changed_attributes # => {"name" => "bob"}
def changed_attributes
- @changed_attributes ||= {}
+ @changed_attributes ||= ActiveSupport::HashWithIndifferentAccess.new
end
private