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-rw-r--r--activerecord/lib/active_record/type/serialized.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/type/serialized.rb b/activerecord/lib/active_record/type/serialized.rb
index 6af05c1860..edbd20a6c1 100644
--- a/activerecord/lib/active_record/type/serialized.rb
+++ b/activerecord/lib/active_record/type/serialized.rb
@@ -1,6 +1,8 @@
module ActiveRecord
module Type
class Serialized < DelegateClass(ActiveModel::Type::Value) # :nodoc:
+ undef to_yaml if method_defined?(:to_yaml)
+
include ActiveModel::Type::Helpers::Mutable
attr_reader :subtype, :coder