diff --git a/Library/Homebrew/caveats.rb b/Library/Homebrew/caveats.rb
index 1b4e96d5e6..01ad2bd278 100644
--- a/Library/Homebrew/caveats.rb
+++ b/Library/Homebrew/caveats.rb
@@ -2,6 +2,9 @@
 
 require "language/python"
 
+# A formula's caveats.
+#
+# @api private
 class Caveats
   extend Forwardable