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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 754f698e48..218b7a735a 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -596,6 +596,7 @@ module ActionMailer
class NullMail #:nodoc:
def body; '' end
+ def header; {} end
def respond_to?(string, include_all=false)
true