diff --git a/Library/Homebrew/build_options.rb b/Library/Homebrew/build_options.rb
index fc81bb8218..be0da2a8ef 100644
--- a/Library/Homebrew/build_options.rb
+++ b/Library/Homebrew/build_options.rb
@@ -1,5 +1,8 @@
 # frozen_string_literal: true
 
+# Options for a formula build.
+#
+# @api private
 class BuildOptions
   # @private
   def initialize(args, options)