diff --git a/activemodel/lib/active_model/serialization.rb b/activemodel/lib/active_model/serialization.rb
index f659419293ba439c8ef51c031d5f74c820e6bdcd..caf44a2ee08593a46ebcba83be2a5cdfce0b5c1c 100644
--- a/activemodel/lib/active_model/serialization.rb
+++ b/activemodel/lib/active_model/serialization.rb
@@ -15,7 +15,7 @@ module ActiveModel
   #     attr_accessor :name
   #
   #     def attributes
-  #       @attributes ||= {'name' => nil}
+  #       {'name' => name}
   #     end
   #
   #   end
@@ -45,7 +45,7 @@ module ActiveModel
   #     attr_accessor :name
   #
   #     def attributes
-  #       @attributes ||= {'name' => nil}
+  #       {'name' => name}
   #     end
   #
   #   end