diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index cd7638393141acd49223a98940405b8c4a412ea2..1bde73563e19e73f707c2c121428d7a86fc6eba9 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -5,6 +5,7 @@
 require 'active_support/core_ext/object/blank'
 require 'active_support/core_ext/proc'
 require 'active_support/core_ext/string/inflections'
+require 'active_support/core_ext/hash/except'
 require 'action_mailer/log_subscriber'
 
 module ActionMailer #:nodoc:
diff --git a/actionpack/lib/abstract_controller/rendering.rb b/actionpack/lib/abstract_controller/rendering.rb
index 691310d5d250665303e7a328e5b80e4fccc2e4f0..ecd0c4fb73e939650f1bfee3247c55bfde6be5a4 100644
--- a/actionpack/lib/abstract_controller/rendering.rb
+++ b/actionpack/lib/abstract_controller/rendering.rb
@@ -1,5 +1,6 @@
 require "abstract_controller/base"
 require "action_view"
+require "active_support/core_ext/object/instance_variables"
 
 module AbstractController
   class DoubleRenderError < Error