diff --git a/doc/ikiwikiusers.mdwn b/doc/ikiwikiusers.mdwn
index a66c0d50d..6e234ceed 100644
--- a/doc/ikiwikiusers.mdwn
+++ b/doc/ikiwikiusers.mdwn
@@ -38,6 +38,7 @@ Projects
 * [dist-bugs](http://dist-bugs.kitenet.net/)
 * [Chaos Computer Club Düsseldorf](https://www.chaosdorf.de)
 * [monkeysphere](http://web.monkeysphere.info/)
+* [The Walden Effect](http://www.waldeneffect.org/)
 
 Personal sites and blogs
 ========================