diff --git a/actionpack/CHANGELOG b/actionpack/CHANGELOG
index f749a09f5549f191bca165b8b8231adbe1c86876..5ec106eb8e5b5fe5cde687e18a97f138c46eb48f 100644
--- a/actionpack/CHANGELOG
+++ b/actionpack/CHANGELOG
@@ -1,5 +1,7 @@
*SVN*
+* Document the :xhr option for verifications. #3666 [leeo]
+
* Added :only and :except controls to skip_before/after_filter just like for when you add filters [DHH]
* Ensure that the instance variables are copied to the template when performing render :update. [Nicholas Seckar]
diff --git a/actionpack/lib/action_controller/verification.rb b/actionpack/lib/action_controller/verification.rb
index 774af345327afda02e51a9f72a18f7bc2fdad2e4..0bef8d85a88237bc6d26281ab4bdd7afbc577d32 100644
--- a/actionpack/lib/action_controller/verification.rb
+++ b/actionpack/lib/action_controller/verification.rb
@@ -47,6 +47,8 @@ module ClassMethods
# must match the current request method in order for the action(s) to
# be safely called. (The key should be a symbol: :get or
# :post, for example.)
+ # * :xhr: true/false option to ensure that the request is coming
+ # from an Ajax call or not.
# * :add_flash: a hash of name/value pairs that should be merged
# into the session's flash if the prerequisites cannot be satisfied.
# * :redirect_to: the redirection parameters to be used when