Index: channels/chan_sip.c
===================================================================
RCS file: /usr/cvsroot/asterisk/channels/chan_sip.c,v
retrieving revision 1.292
diff -c -r1.292 chan_sip.c
*** channels/chan_sip.c	2 Feb 2004 23:51:25 -0000	1.292
--- channels/chan_sip.c	4 Feb 2004 19:49:12 -0000
***************
*** 3305,3310 ****
--- 3305,3311 ----
  	add_header(&req, "Refer-To", referto);
  	if (strlen(p->our_contact))
  		add_header(&req, "Referred-By", p->our_contact);
+ 	add_blank_header(&req);
  	return send_request(p, &req, 1, p->ocseq);
  }