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-rw-r--r--activemodel/lib/active_model/validator.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/validator.rb b/activemodel/lib/active_model/validator.rb
index 1262d305d1..d424c7ba1d 100644
--- a/activemodel/lib/active_model/validator.rb
+++ b/activemodel/lib/active_model/validator.rb
@@ -1,6 +1,7 @@
require 'active_support/core_ext/array/wrap'
require "active_support/core_ext/module/anonymous"
require 'active_support/core_ext/object/blank'
+require 'action_controller/metal/exceptions'
module ActiveModel #:nodoc: