1 files changed, 3 insertions, 1 deletions
diff --git a/activemodel/lib/active_model/validations/acceptance.rb b/activemodel/lib/active_model/validations/acceptance.rb
index 78e6f67a47..139de16326 100644
--- a/activemodel/lib/active_model/validations/acceptance.rb
+++ b/activemodel/lib/active_model/validations/acceptance.rb
@@ -4,6 +4,7 @@ module ActiveModel
     class AcceptanceValidator < EachValidator # :nodoc:
       def initialize(options)
         super({ allow_nil: true, accept: "1" }.merge!(options))
+        setup!(options[:class])
       end
 
       def validate_each(record, attribute, value)
@@ -12,7 +13,8 @@ module ActiveModel
         end
       end
 
-      def setup(klass)
+      private
+      def setup!(klass)
         attr_readers = attributes.reject { |name| klass.attribute_method?(name) }
         attr_writers = attributes.reject { |name| klass.attribute_method?("#{name}=") }
         klass.send(:attr_reader, *attr_readers)