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-rw-r--r--actionmailer/lib/action_mailer/collector.rb3
1 files changed, 1 insertions, 2 deletions
diff --git a/actionmailer/lib/action_mailer/collector.rb b/actionmailer/lib/action_mailer/collector.rb
index bd4f76bbb6..d03e085e83 100644
--- a/actionmailer/lib/action_mailer/collector.rb
+++ b/actionmailer/lib/action_mailer/collector.rb
@@ -22,8 +22,7 @@ module ActionMailer #:nodoc:
def custom(mime, options={})
options.reverse_merge!(:content_type => mime.to_s)
- @context.formats = [mime.to_sym]
- @context.formats.freeze
+ @context.freeze_formats([mime.to_sym])
options[:body] = block_given? ? yield : @default_render.call
@responses << options
end