1 files changed, 5 insertions, 1 deletions
diff --git a/activemodel/lib/active_model/validations/confirmation.rb b/activemodel/lib/active_model/validations/confirmation.rb
index 3a3abce364..d14fb4dc53 100644
--- a/activemodel/lib/active_model/validations/confirmation.rb
+++ b/activemodel/lib/active_model/validations/confirmation.rb
@@ -10,9 +10,13 @@ module ActiveModel
       end
 
       def setup(klass)
-        klass.send(:attr_accessor, *attributes.map do |attribute|
+        klass.send(:attr_reader, *attributes.map do |attribute|
           :"#{attribute}_confirmation" unless klass.method_defined?(:"#{attribute}_confirmation")
         end.compact)
+
+        klass.send(:attr_writer, *attributes.map do |attribute|
+          :"#{attribute}_confirmation" unless klass.method_defined?(:"#{attribute}_confirmation=")
+        end.compact)
       end
     end