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-rw-r--r--lib/gitlab/mail_room.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/gitlab/mail_room.rb b/lib/gitlab/mail_room.rb
index db04356a5e9..78f2d83c1af 100644
--- a/lib/gitlab/mail_room.rb
+++ b/lib/gitlab/mail_room.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require 'yaml'
require 'json'
require_relative 'redis/queues' unless defined?(Gitlab::Redis::Queues)