diff --git a/xep.ent b/xep.ent
index 62021b68..53040aef 100644
--- a/xep.ent
+++ b/xep.ent
@@ -1147,3 +1147,4 @@ IANA Service Location Protocol, Version 2 (SLPv2) Templates</link></span> <note>
 <!ENTITY xep0277 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0277.html'>Microblogging Over XMPP</link></span> <note>XEP-0277: Microblogging over XMPP &lt;<link url='http://xmpp.org/extensions/xep-0277.html'>http://xmpp.org/extensions/xep-0277.html</link>&gt;.</note>" >
 <!ENTITY xep0278 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0278.html'>Jingle Nodes</link></span> <note>XEP-0278: Jingle Nodes &lt;<link url='http://xmpp.org/extensions/xep-0278.html'>http://xmpp.org/extensions/xep-0278.html</link>&gt;.</note>" >
 <!ENTITY xep0279 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0279.html'>Server IP Check</link></span> <note>XEP-0279: Server IP Check &lt;<link url='http://xmpp.org/extensions/xep-0279.html'>http://xmpp.org/extensions/xep-0279.html</link>&gt;.</note>" >
+<!ENTITY xep0280 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0280.html'>Message Carbons</link></span> <note>XEP-0280: Message Carbons &lt;<link url='http://xmpp.org/extensions/xep-0280.html'>http://xmpp.org/extensions/xep-0280.html</link>&gt;.</note>" >