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-rw-r--r--lib/chef/cookbook_uploader.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/chef/cookbook_uploader.rb b/lib/chef/cookbook_uploader.rb
index e2393b91f6..9aeecf7716 100644
--- a/lib/chef/cookbook_uploader.rb
+++ b/lib/chef/cookbook_uploader.rb
@@ -1,5 +1,5 @@
-require "set"
+require "set" unless defined?(Set)
require_relative "exceptions"
require_relative "knife/cookbook_metadata"
require_relative "digester"