diff --git a/activeresource/CHANGELOG b/activeresource/CHANGELOG
index a4e79f3d7786e..25f9242b98661 100644
--- a/activeresource/CHANGELOG
+++ b/activeresource/CHANGELOG
@@ -1,11 +1,15 @@
 *Rails 3.1.0 (unreleased)*
 
-* No changes
+* The default format has been changed to JSON for all requests. If you want to continue to use XML you will need to set `self.format = :xml` in the class. eg.
+
+class User < ActiveResource::Base
+  self.format = :xml
+end
 
 
 *Rails 3.0.7 (April 18, 2011)*
 
-*No changes.
+* No changes.
 
 
 *Rails 3.0.6 (April 5, 2011)
@@ -95,14 +99,14 @@
 * Ruby 1.9 compatibility.  [Jeremy Kemper]
 
 
-*2.0.2* (December 16th, 2007)
+*2.0.2 (December 16th, 2007)*
 
 * Added more specific exceptions for 400, 401, and 403 (all descending from ClientError so existing rescues will work) #10326 [trek]
 
 * Correct empty response handling.  #10445 [seangeo]
 
 
-*2.0.1* (December 7th, 2007)
+*2.0.1 (December 7th, 2007)*
 
 * Don't cache net/http object so that ActiveResource is more thread-safe.  Closes #10142 [kou]