diff --git a/REAL_README b/REAL_README
index 0938289f..88d5de13 100644
--- a/REAL_README
+++ b/REAL_README
@@ -165,7 +165,8 @@ Yes, I'm actually eating my own dogfood and currently managing
  * [kerberos (mit)](http://web.mit.edu/kerberos/) (authentication)
  * [ircd-hybrid](http://www.ircd-hybrid.org/) (chat)
  * [stunnel](http://stunnel.mirt.net/) (SSL tunnel)
+ * [mercurial-server](http://www.lshift.net/mercurial-server.html)
 
-with cdist on a total of **3** production servers of the
+with cdist on a total of **4** production servers of the
 [Systems Group](http://www.systems.ethz.ch) at the
 [ETH Zurich](http://www.ethz.ch).