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-rw-r--r--actionmailer/lib/action_mailer/delivery_methods.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionmailer/lib/action_mailer/delivery_methods.rb b/actionmailer/lib/action_mailer/delivery_methods.rb
index aedcd81e52..9a1a27c8ed 100644
--- a/actionmailer/lib/action_mailer/delivery_methods.rb
+++ b/actionmailer/lib/action_mailer/delivery_methods.rb
@@ -64,7 +64,7 @@ module ActionMailer
raise "Delivery method cannot be nil"
when Symbol
if klass = delivery_methods[method]
- mail.delivery_method(klass, (send(:"#{method}_settings") || {}).merge(options || {}))
+ mail.delivery_method(klass,(send(:"#{method}_settings") || {}).merge!(options || {}))
else
raise "Invalid delivery method #{method.inspect}"
end