diff --git a/activemodel/lib/active_model/errors.rb b/activemodel/lib/active_model/errors.rb
index 6ea85a288cc29..93935c04730a0 100644
--- a/activemodel/lib/active_model/errors.rb
+++ b/activemodel/lib/active_model/errors.rb
@@ -41,7 +41,10 @@ module ActiveModel
   # 
   # The last three methods are required in your object for Errors to be
   # able to generate error messages correctly and also handle multiple
-  # languages.
+  # languages.  Of course, if you extend your object with ActiveModel::Translations
+  # you will not need to implement the last two.  Likewise, using
+  # ActiveModel::Validations will handle the validation related methods
+  # for you.
   # 
   # The above allows you to do:
   #