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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 0519783d02..793cd53518 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -2,6 +2,7 @@ require 'mail'
require 'action_mailer/tmail_compat'
require 'action_mailer/collector'
require 'active_support/core_ext/array/wrap'
+require 'active_support/core_ext/object/blank'
module ActionMailer #:nodoc:
# Action Mailer allows you to send email from your application using a mailer model and views.