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diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 8f1f315e42..4f4e087acd 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,5 +1,25 @@
 ## Rails 4.0.0 (unreleased) ##
 
+*   Allow blocks for `count` with `ActiveRecord::Relation`, to work similar as
+    `Array#count`:
+
+        Person.where("age > 26").count { |person| gender == 'female' }
+
+    *Chris Finne & Carlos Antonio da Silva*
+
+*   Added support to `CollectionAssociation#delete` for passing `fixnum`
+    or `string` values as record ids. This finds the records responding
+    to the `id` and executes delete on them.
+
+        class Person < ActiveRecord::Base
+          has_many :pets
+        end
+
+        person.pets.delete("1") # => [#<Pet id: 1>]
+        person.pets.delete(2, 3) # => [#<Pet id: 2>, #<Pet id: 3>]
+
+    *Francesco Rodriguez*
+
 *   Deprecated most of the 'dynamic finder' methods. All dynamic methods
     except for `find_by_...` and `find_by_...!` are deprecated. Here's
     how you can rewrite the code: