diff --git a/Library/Homebrew/formula_info.rb b/Library/Homebrew/formula_info.rb
index 4243d6d392..9165643948 100644
--- a/Library/Homebrew/formula_info.rb
+++ b/Library/Homebrew/formula_info.rb
@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
-# Formula info drawn from an external `brew info --json` call
-
+# Formula information drawn from an external `brew info --json` call.
+#
+# @api private
 class FormulaInfo
   # The whole info structure parsed from the JSON
   attr_accessor :info