Index: channels/chan_sip.c
===================================================================
RCS file: /usr/cvsroot/asterisk/channels/chan_sip.c,v
retrieving revision 1.677
diff -u -r1.677 chan_sip.c
--- channels/chan_sip.c	17 Mar 2005 23:03:07 -0000	1.677
+++ channels/chan_sip.c	19 Mar 2005 09:26:46 -0000
@@ -3429,7 +3429,7 @@
 
 	/* Add tag *unless* this is a CANCEL, in which case we need to send it exactly
 	   as our original request, including tag (or presumably lack thereof) */
-	if (!strstr(ot, "tag=") && sipmethod == SIP_CANCEL) {
+	if (!strstr(ot, "tag=") && sipmethod != SIP_CANCEL) {
 		/* Add the proper tag if we don't have it already.  If they have specified
 		   their tag, use it.  Otherwise, use our own tag */
 		if (ast_test_flag(p, SIP_OUTGOING) && !ast_strlen_zero(p->theirtag))