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-rw-r--r--actionpack/lib/action_view/helpers/prototype_helper.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/helpers/prototype_helper.rb b/actionpack/lib/action_view/helpers/prototype_helper.rb
index a3eccc741d..7fab3102e7 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