diff --git a/xep.ent b/xep.ent
index fde2b24b..cf54c27f 100644
--- a/xep.ent
+++ b/xep.ent
@@ -530,6 +530,7 @@ THE SOFTWARE.
RFC 4505 RFC 4505: The SASL ANONYMOUS Mechanism <http://tools.ietf.org/html/rfc4505>." >
RFC 4566 RFC 4566: SDP: Session Description Protocol <http://tools.ietf.org/html/rfc4566>." >
RFC 4568 RFC 4568: Session Description Protocol (SDP) Security Descriptions for Media Streams <http://tools.ietf.org/html/rfc4568>." >
+RFC 4571 RFC 4571: Framing Real-time Transport Protocol (RTP) and RTP Control Protocol (RTCP) Packets over Connection-Oriented Transport <http://tools.ietf.org/html/rfc4571>." >
RFC 4622 RFC 4622: Internationalized Resource Identifiers (IRIs) and Uniform Resource Identifiers (URIs) for the Extensible Messaging and Presence Protocol (XMPP) <http://tools.ietf.org/html/rfc4622>." >
RFC 4627 RFC 4627: The application/json Media Type for JavaScript Object Notation (JSON) <http://tools.ietf.org/html/rfc4627>." >
RFC 4646 RFC 4646: Tags for Identifying Languages <http://tools.ietf.org/html/rfc4646>." >