diff --git a/actionpack/lib/action_view/helpers/prototype_helper.rb b/actionpack/lib/action_view/helpers/prototype_helper.rb
index a3eccc741dbdfafdb691cbd99330a0ff7c5c8543..7fab3102e7ba06ef87d5e85c7cce6c1ac5d458de 100644
--- a/actionpack/lib/action_view/helpers/prototype_helper.rb
+++ b/actionpack/lib/action_view/helpers/prototype_helper.rb
@@ -1,4 +1,5 @@
 require 'set'
+require 'active_support/json'
 
 module ActionView
   module Helpers
diff --git a/actionpack/lib/action_view/helpers/scriptaculous_helper.rb b/actionpack/lib/action_view/helpers/scriptaculous_helper.rb
index 1d01dafd0e9dd87fd1f58a011d1178f0d88ff05a..e16935ea87ea8a145f4a10a3363b775d5cd7d5b7 100644
--- a/actionpack/lib/action_view/helpers/scriptaculous_helper.rb
+++ b/actionpack/lib/action_view/helpers/scriptaculous_helper.rb
@@ -1,4 +1,5 @@
 require 'action_view/helpers/javascript_helper'
+require 'active_support/json'
 
 module ActionView
   module Helpers