diff --git a/activerecord/lib/active_record/validations.rb b/activerecord/lib/active_record/validations.rb
index d2d12b8..91e7154 100644
--- a/activerecord/lib/active_record/validations.rb
+++ b/activerecord/lib/active_record/validations.rb
@@ -211,6 +211,15 @@ module ActiveRecord
       full_messages
     end 
 
+    def attribute_message_pairs
+      @errors.inject([]) do |result, (attr, messages)|
+        result + messages.map do |message|
+          message_text = (attr == 'base' ? message : "#{@base.class.human_attribute_name(attr)} #{message}")
+          [attr, message_text]
+        end
+      end
+    end
+
     # Returns true if no errors have been added.
     def empty?
       @errors.empty?
@@ -251,7 +260,7 @@ module ActiveRecord
 
       options[:builder].instruct! unless options.delete(:skip_instruct)
       options[:builder].errors do |e|
-        full_messages.each { |msg| e.error(msg) }
+        attribute_message_pairs.each { |(attr,msg)| e.error(msg, :field=>attr) }
       end
     end
     
diff --git a/activerecord/test/cases/validations_test.rb b/activerecord/test/cases/validations_test.rb
index c20f5ae..b965754 100644
--- a/activerecord/test/cases/validations_test.rb
+++ b/activerecord/test/cases/validations_test.rb
@@ -1417,8 +1417,8 @@ class ValidationsTest < ActiveRecord::TestCase
     assert !r.valid?
     xml = r.errors.to_xml(:skip_instruct => true)
     assert_equal "<errors>", xml.first(8)
-    assert xml.include?("<error>Title is Wrong Create</error>")
-    assert xml.include?("<error>Content Empty</error>")
+    assert xml.include?("<error field=\"title\">Title is Wrong Create</error>")
+    assert xml.include?("<error field=\"content\">Content Empty</error>")
   end
 
   def test_validation_order