diff --git a/doc/ikiwikiusers.mdwn b/doc/ikiwikiusers.mdwn
index 3f82e7208..ff8e3b6d7 100644
--- a/doc/ikiwikiusers.mdwn
+++ b/doc/ikiwikiusers.mdwn
@@ -37,6 +37,7 @@ Projects
 * [Finnish Debian community](http://debian.fi)
 * [INCL intranuclear cascade and ABLA evaporation/fission](http://www.cs.helsinki.fi/u/kaitanie/incl/)
 * [dist-bugs](http://dist-bugs.kitenet.net/)
+* [Chaos Computer Club Düsseldorf](https://www.chaosdorf.de)
 
 Personal sites and blogs
 ========================