diff --git a/Library/Homebrew/utils/tty.rb b/Library/Homebrew/utils/tty.rb
index 4e7044c857..a09f2f375b 100644
--- a/Library/Homebrew/utils/tty.rb
+++ b/Library/Homebrew/utils/tty.rb
@@ -1,5 +1,8 @@
 # frozen_string_literal: true
 
+# Various helper functions for interacting with TTYs.
+#
+# @api private
 module Tty
   module_function