diff --git a/Makefile b/Makefile
index 3696a77b74..5b154a96cf 100644
--- a/Makefile
+++ b/Makefile
@@ -39,6 +39,8 @@ test-internet: all
 benchmark: all
 	build/default/node benchmark/run.js
 
+# http://rtomayko.github.com/ronn
+# gem install ronn
 doc: doc/node.1 doc/api.html doc/index.html doc/changelog.html
 
 doc/api.html: doc/api.markdown