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diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index f1cca0ad76..278baee68f 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,5 +1,24 @@
 ## Rails 4.0.0 (unreleased) ##
 
+*   PostgreSQL ranges type support. Includes: int4range, int8range,
+    numrange, tsrange, tstzrange, daterange
+
+    Ranges can be created with inclusive and exclusive bounds.
+
+    Example:
+
+        create_table :Room do |t|
+          t.daterange :availability
+        end
+
+        Room.create(availability: (Date.today..Float::INFINITY))
+        Room.first.availability # => Wed, 19 Sep 2012..Infinity
+
+    One thing to note: Range class does not support exclusive lower
+    bound.
+
+    *Alexander Grebennik*
+
 *   Added a state instance variable to each transaction. Will allow other objects
     to know whether a transaction has been committed or rolled back.