diff --git a/lib/blueprinter/extractors/auto_extractor.rb b/lib/blueprinter/extractors/auto_extractor.rb
index <HASH>..<HASH> 100644
--- a/lib/blueprinter/extractors/auto_extractor.rb
+++ b/lib/blueprinter/extractors/auto_extractor.rb
@@ -1,4 +1,5 @@
 module Blueprinter
+  # @api private
   class AutoExtractor < Extractor
     def initialize
       @hash_extractor = HashExtractor.new
Add private tag to AutoExtractor