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-rw-r--r--actionmailer/lib/action_mailer/base.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 06de43b76f..1e91d62e24 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: