diff --git a/activemodel/README.rdoc b/activemodel/README.rdoc
index f6beff14e1f0a46f24dcd954806c68c7658000c7..0985f56bfb377ff0596567f333485e764a246c0a 100644
--- a/activemodel/README.rdoc
+++ b/activemodel/README.rdoc
@@ -219,7 +219,7 @@ behavior out of the box:
   
     class HasNameValidator < ActiveModel::Validator
       def validate(record)
-        record.errors[:name] = "must exist" if record.name.blank?
+        record.errors.messages[:name] << "must exist" if record.name.blank?
       end
     end
 
diff --git a/activemodel/lib/active_model/validator.rb b/activemodel/lib/active_model/validator.rb
index b98585912e3729861767a07fea5052c200a41346..5752771d8ce848845b6f186bcb7a2f5e1497faa7 100644
--- a/activemodel/lib/active_model/validator.rb
+++ b/activemodel/lib/active_model/validator.rb
@@ -15,7 +15,7 @@ module ActiveModel
   #   class MyValidator < ActiveModel::Validator
   #     def validate(record)
   #       if some_complex_logic
-  #         record.errors[:base] = "This record is invalid"
+  #         record.errors.messages[:base] << "This record is invalid"
   #       end
   #     end
   #
diff --git a/guides/source/active_record_validations.md b/guides/source/active_record_validations.md
index de26a9bd6db1f392b01ef155e039403aedc8f544..31c5b07a05bf447b29de3b8c02e11d56a7546ed8 100644
--- a/guides/source/active_record_validations.md
+++ b/guides/source/active_record_validations.md
@@ -1078,7 +1078,7 @@ Another way to do this is using `[]=` setter
 ```ruby
   class Person < ActiveRecord::Base
     def a_method_used_for_validation_purposes
-      errors[:name] = "cannot contain the characters !@#%*()_-+="
+      errors.messages[:name] << "cannot contain the characters !@#%*()_-+="
     end
   end