diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 9c9314ec20..4b1b3bda0e 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -40,6 +40,9 @@
 
 ## Rails 3.2.0 (unreleased) ##
 
+*   'on' and 'ON' boolean columns values are type casted to true
+    *Santiago Pastorino*
+
 *   Added ability to run migrations only for given scope, which allows
     to run migrations only from one engine (for example to revert changes
     from engine that you want to remove).
diff --git a/railties/guides/source/3_2_release_notes.textile b/railties/guides/source/3_2_release_notes.textile
index b65daece91..eb816f70c4 100644
--- a/railties/guides/source/3_2_release_notes.textile
+++ b/railties/guides/source/3_2_release_notes.textile
@@ -264,6 +264,8 @@ h5. Deprecations
 
 h3. Active Record
 
+* 'on' and 'ON' boolean columns values are type casted to true
+
 * Implemented <tt>ActiveRecord::Relation#explain</tt>.
 
 * Implements <tt>AR::Base.silence_auto_explain</tt> which allows the user to selectively disable automatic EXPLAINs within a block.