diff --git a/Library/Homebrew/requirements/java_requirement.rb b/Library/Homebrew/requirements/java_requirement.rb
index a2e4fa2d9e..d6ba1a9332 100644
--- a/Library/Homebrew/requirements/java_requirement.rb
+++ b/Library/Homebrew/requirements/java_requirement.rb
@@ -2,6 +2,9 @@
 
 require "language/java"
 
+# A requirement on Java.
+#
+# @api private
 class JavaRequirement < Requirement
   fatal true