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-rw-r--r--guides/source/action_mailer_basics.md2
1 files changed, 1 insertions, 1 deletions
diff --git a/guides/source/action_mailer_basics.md b/guides/source/action_mailer_basics.md
index 9a5204848b..c9e35dd985 100644
--- a/guides/source/action_mailer_basics.md
+++ b/guides/source/action_mailer_basics.md
@@ -50,7 +50,7 @@ create test/mailers/previews/user_mailer_preview.rb
```ruby
# app/mailers/application_mailer.rb
class ApplicationMailer < ActionMailer::Base
- default "from@example.com"
+ default from: "from@example.com"
layout 'mailer'
end