diff --git a/src/sipreg/reg.c b/src/sipreg/reg.c
index 76e558c75..1cbb56a05 100644
--- a/src/sipreg/reg.c
+++ b/src/sipreg/reg.c
@@ -223,6 +223,12 @@ static void response_handler(int err, const struct sip_msg *msg, void *arg)
 
 		case 401:
 		case 407:
+			if (reg->ls.failc > 1 &&
+			    reg->ls.last_scode == msg->scode) {
+				reg->failc++;
+				goto out;
+			}
+
 			sip_auth_reset(reg->auth);
 			err = sip_auth_authenticate(reg->auth, msg);
 			if (err) {