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-rwxr-xr-xchannels/chan_sip.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index b47ec0981..1d94f8072 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -828,7 +828,7 @@ static void build_via(struct sip_pvt *p, char *buf, int len)
char iabuf[INET_ADDRSTRLEN];
/* z9hG4bK is a magic cookie. See RFC 3261 section 8.1.1.7 */
- if (ast_test_flag(p, SIP_NAT) != SIP_NAT_NEVER)
+ if (ast_test_flag(p, SIP_NAT) & SIP_NAT_RFC3581)
snprintf(buf, len, "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x;rport", ast_inet_ntoa(iabuf, sizeof(iabuf), p->ourip), ourport, p->branch);
else /* Work around buggy UNIDEN UIP200 firmware */
snprintf(buf, len, "SIP/2.0/UDP %s:%d;branch=z9hG4bK%08x", ast_inet_ntoa(iabuf, sizeof(iabuf), p->ourip), ourport, p->branch);