diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index cd76383931..1bde73563e 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -5,6 +5,7 @@ require 'active_support/core_ext/array/wrap'
 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 691310d5d2..ecd0c4fb73 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