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-rw-r--r--pjsip/src/pjsua-lib/pjsua_acc.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/pjsip/src/pjsua-lib/pjsua_acc.c b/pjsip/src/pjsua-lib/pjsua_acc.c
index 461205e8..689d35b8 100644
--- a/pjsip/src/pjsua-lib/pjsua_acc.c
+++ b/pjsip/src/pjsua-lib/pjsua_acc.c
@@ -643,7 +643,8 @@ static pj_bool_t acc_check_nat_addr(pjsua_acc *acc,
/* Do not switch if both Contact and server's IP address are
* public but response contains private IP. A NAT in the middle
- * might have messed up with the SIP packets.
+ * might have messed up with the SIP packets. See:
+ * http://trac.pjsip.org/repos/ticket/643
*
* This exception can be disabled by setting allow_contact_rewrite
* to 2. In this case, the switch will always be done whenever there