diff --git a/xep.ent b/xep.ent
index 2974cfd7..8389e4f2 100644
--- a/xep.ent
+++ b/xep.ent
@@ -1214,3 +1214,4 @@ IANA Service Location Protocol, Version 2 (SLPv2) Templates</link></span> <note>
 <!ENTITY xep0301 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0301.html'>In-Band Real Time Text</link></span> <note>XEP-0301: In-Band Real Time Text &lt;<link url='http://xmpp.org/extensions/xep-0301.html'>http://xmpp.org/extensions/xep-0301.html</link>&gt;.</note>" >
 <!ENTITY xep0302 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0302.html'>XMPP Compliance Suites 2012</link></span> <note>XEP-0302: XMPP Compliance Suites 2012 &lt;<link url='http://xmpp.org/extensions/xep-0302.html'>http://xmpp.org/extensions/xep-0302.html</link>&gt;.</note>" >
 <!ENTITY xep0303 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0303.html'>Commenting</link></span> <note>XEP-0303: Commenting &lt;<link url='http://xmpp.org/extensions/xep-0303.html'>http://xmpp.org/extensions/xep-0303.html</link>&gt;.</note>" >
+<!ENTITY xep0304 "<span class='ref'><link url='http://xmpp.org/extensions/xep-0304.html'>Whitespace Keepalive Negotiation</link></span> <note>XEP-0304: Whitespace Keepalive Negotiation &lt;<link url='http://xmpp.org/extensions/xep-0304.html'>http://xmpp.org/extensions/xep-0304.html</link>&gt;.</note>" >