diff --git a/railties/guides/source/3_0_release_notes.textile b/railties/guides/source/3_0_release_notes.textile
index 5e96f8cf06..7679302ff9 100644
--- a/railties/guides/source/3_0_release_notes.textile
+++ b/railties/guides/source/3_0_release_notes.textile
@@ -8,7 +8,7 @@ Even if you don't give a hoot about any of our internal cleanups, Rails 3.0 is g
 
 * Brand new router with an emphasis on RESTful declarations
 * New Action Mailer API modelled after Action Controller (now without the agonizing pain of sending multipart messages!)
-* New Active Record chainable query language built on top of relational algebra
+* New Active Record chainable query language built on top of "Arel":http://github.com/brynary/arel, a relational algebra engine
 * Unobtrusive JavaScript helpers with drivers for Prototype, jQuery, and more coming (end of inline JS)
 * Explicit dependency management with Bundler
 
@@ -131,7 +131,7 @@ More Information: - "Rails Edge Architecture":http://yehudakatz.com/2009/06/11/r
 
 h4. Arel Integration
 
-"Arel":http://github.com/rails/arel (or Active Relation) has been taken on as the underpinnings of Active Record and is now required for Rails.  Arel provides an SQL abstraction that simplifies out Active Record and provides the underpinnings for the relation functionality in Active Record.
+"Arel":http://github.com/brynary/arel (or Active Relation) has been taken on as the underpinnings of Active Record and is now required for Rails.  Arel provides an SQL abstraction that simplifies out Active Record and provides the underpinnings for the relation functionality in Active Record.
 
 More information: - "Why I wrote Arel":http://magicscalingsprinkles.wordpress.com/2010/01/28/why-i-wrote-arel/.