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-rw-r--r--lib/gitlab/metrics/samplers/ruby_sampler.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/gitlab/metrics/samplers/ruby_sampler.rb b/lib/gitlab/metrics/samplers/ruby_sampler.rb
index 7b2b3bedf04..232a58a7d69 100644
--- a/lib/gitlab/metrics/samplers/ruby_sampler.rb
+++ b/lib/gitlab/metrics/samplers/ruby_sampler.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require 'prometheus/client/support/unicorn'
module Gitlab