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-rw-r--r--activerecord/lib/active_record/legacy_yaml_adapter.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/legacy_yaml_adapter.rb b/activerecord/lib/active_record/legacy_yaml_adapter.rb
index 23644aab8f..ffa095dd94 100644
--- a/activerecord/lib/active_record/legacy_yaml_adapter.rb
+++ b/activerecord/lib/active_record/legacy_yaml_adapter.rb
@@ -8,7 +8,7 @@ module ActiveRecord
case coder["active_record_yaml_version"]
when 1, 2 then coder
else
- if coder["attributes"].is_a?(AttributeSet)
+ if coder["attributes"].is_a?(ActiveModel::AttributeSet)
Rails420.convert(klass, coder)
else
Rails41.convert(klass, coder)