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-rw-r--r--lib/chef/cookbook_uploader.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/chef/cookbook_uploader.rb b/lib/chef/cookbook_uploader.rb
index 34a982f0fb..acd913e72c 100644
--- a/lib/chef/cookbook_uploader.rb
+++ b/lib/chef/cookbook_uploader.rb
@@ -8,6 +8,7 @@ require 'chef/cookbook_version'
require 'chef/cookbook/syntax_check'
require 'chef/cookbook/file_system_file_vendor'
require 'chef/sandbox'
+require 'thread'
class Chef
class CookbookUploader