Index: chan_sip.c
===================================================================
RCS file: /usr/cvsroot/asterisk/channels/chan_sip.c,v
retrieving revision 1.510.2.64
diff -u -r1.510.2.64 chan_sip.c
--- chan_sip.c	31 May 2005 02:47:10 -0000	1.510.2.64
+++ chan_sip.c	31 May 2005 04:07:08 -0000
@@ -2094,6 +2094,7 @@
 	{ "To", "t" },
 	{ "Supported", "k" },
 	{ "Refer-To", "r" },
+	{ "Referred-By", "b" },
 	{ "Allow-Events", "u" },
 	{ "Event", "o" },
 	{ "Via", "v" },