diff --git a/activerecord/CHANGELOG b/activerecord/CHANGELOG
index 111d645ea9..32cb4562a0 100644
--- a/activerecord/CHANGELOG
+++ b/activerecord/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* ActiveRecord::RecordInvalid now states which validations failed in its default error message [Tobias Luetke]
+
 * Using AssociationCollection#build with arrays of hashes should call build, not create [DHH]
 
 * Remove definition of reloadable? from ActiveRecord::Base to make way for new Reloadable code. [Nicholas Seckar]
diff --git a/activerecord/lib/active_record/validations.rb b/activerecord/lib/active_record/validations.rb
index 3ba2f12ac1..7d1661449c 100755
--- a/activerecord/lib/active_record/validations.rb
+++ b/activerecord/lib/active_record/validations.rb
@@ -8,9 +8,9 @@ module ActiveRecord
   #   end
   class RecordInvalid < ActiveRecordError
     attr_reader :record
-    def initialize(record, *args)
+    def initialize(record)
       @record = record
-      super(*args)
+      super("Validation failed: #{@record.errors.full_messages.join(", ")}")
     end
   end