diff --git a/xep.ent b/xep.ent
index 4214bb86..007f357c 100644
--- a/xep.ent
+++ b/xep.ent
@@ -1170,3 +1170,4 @@ IANA Service Location Protocol, Version 2 (SLPv2) Templates</link></span> <note>
 <!ENTITY xep0286 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0286.html'>XMPP on Mobile Devices</link></span> <note>XEP-0286: XMPP on Mobile Devices &lt;<link url='http://xmpp.org/extensions/xep-0286.html'>http://xmpp.org/extensions/xep-0286.html</link>&gt;.</note>" >
 <!ENTITY xep0287 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0287.html'>Spim Markers and Reports</link></span> <note>XEP-0287: Spim Markers and Reports &lt;<link url='http://xmpp.org/extensions/xep-0287.html'>http://xmpp.org/extensions/xep-0287.html</link>&gt;.</note>" >
 <!ENTITY xep0288 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0288.html'>Bidirectional Server-to-Server Connections</link></span> <note>XEP-0288: Bidirectional Server-to-Server Connections &lt;<link url='http://xmpp.org/extensions/xep-0288.html'>http://xmpp.org/extensions/xep-0288.html</link>&gt;.</note>" >
+<!ENTITY xep0289 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0289.html'>Federated MUC for Constrained Environments</link></span> <note>XEP-0289: Federated MUC for Constrained Environments &lt;<link url='http://xmpp.org/extensions/xep-0289.html'>http://xmpp.org/extensions/xep-0289.html</link>&gt;.</note>" >