diff --git a/xep.ent b/xep.ent
index b49a5b48..e72f68e2 100644
--- a/xep.ent
+++ b/xep.ent
@@ -1095,3 +1095,4 @@ IANA Service Location Protocol, Version 2 (SLPv2) Templates</link></span> <note>
 <!ENTITY xep0263 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0263.html'>ECO-XMPP</link></span> <note>XEP-0263: ECO-XMPP &lt;<link url='http://xmpp.org/extensions/xep-0263.html'>http://xmpp.org/extensions/xep-0263.html</link>&gt;.</note>" >
 <!ENTITY xep0264 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0264.html'>File Transfer Thumbnails</link></span> <note>XEP-0264: File Transfer Thumbnails &lt;<link url='http://xmpp.org/extensions/xep-0264.html'>http://xmpp.org/extensions/xep-0264.html</link>&gt;.</note>" >
 <!ENTITY xep0265 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0265.html'>Out-of-Band Stream Data</link></span> <note>XEP-0265: Out-of-Band Stream Data &lt;<link url='http://xmpp.org/extensions/xep-0265.html'>http://xmpp.org/extensions/xep-0265.html</link>&gt;.</note>" >
+<!ENTITY xep0266 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0266.html'>Codecs for Jingle RTP Sessions</link></span> <note>XEP-0266: Codecs for Jingle RTP Sessions &lt;<link url='http://xmpp.org/extensions/xep-0266.html'>http://xmpp.org/extensions/xep-0266.html</link>&gt;.</note>" >