diff --git a/xep.ent b/xep.ent
index d51fefad..3c1139fd 100644
--- a/xep.ent
+++ b/xep.ent
@@ -400,6 +400,7 @@
 <!ENTITY rfc4347 "<span class='ref'><link url='http://tools.ietf.org/html/rfc4347'>RFC 4347</link></span> <note>RFC 4347: Datagram Transport Layer Security &lt;<link url='http://tools.ietf.org/html/rfc4347'>http://tools.ietf.org/html/rfc4347</link>&gt;.</note>" >
 <!ENTITY rfc4395 "<span class='ref'><link url='http://tools.ietf.org/html/rfc4395'>RFC 4395</link></span> <note>RFC 4395: Guidelines and Registration Procedures for New URI Schemes &lt;<link url='http://tools.ietf.org/html/rfc4395'>http://tools.ietf.org/html/rfc4395</link>&gt;.</note>" >
 <!ENTITY rfc4422 "<span class='ref'><link url='http://tools.ietf.org/html/rfc4422'>RFC 4422</link></span> <note>RFC 4422: Simple Authentication and Security Layer (SASL) &lt;<link url='http://tools.ietf.org/html/rfc4422'>http://tools.ietf.org/html/rfc4422</link>&gt;.</note>" >
+<!ENTITY rfc4425 "<span class='ref'><link url='http://tools.ietf.org/html/rfc4425'>RFC 4425</link></span> <note>RFC 4425: RTP Payload Format for Video Codec 1 (VC-1) &lt;<link url='http://tools.ietf.org/html/rfc4425'>http://tools.ietf.org/html/rfc4425</link>&gt;.</note>" >
 <!ENTITY rfc4480 "<span class='ref'><link url='http://tools.ietf.org/html/rfc4480'>RFC 4480</link></span> <note>RFC 4480: RPID: Rich Presence Extensions to the Presence Information Data Format (PIDF) &lt;<link url='http://tools.ietf.org/html/rfc4480'>http://tools.ietf.org/html/rfc4480</link>&gt;.</note>" >
 <!ENTITY rfc4481 "<span class='ref'><link url='http://tools.ietf.org/html/rfc4481'>RFC 4481</link></span> <note>RFC 4481: Timed Presence Extensions to the Presence Information Data Format (PIDF) to Indicate Status Information for Past and Future Time Intervals &lt;<link url='http://tools.ietf.org/html/rfc4481'>http://tools.ietf.org/html/rfc4481</link>&gt;.</note>" >
 <!ENTITY rfc4505 "<span class='ref'><link url='http://tools.ietf.org/html/rfc4505'>RFC 4505</link></span> <note>RFC 4505: The SASL ANONYMOUS Mechanism &lt;<link url='http://tools.ietf.org/html/rfc4505'>http://tools.ietf.org/html/rfc4505</link>&gt;.</note>" >