diff -up linuxptp-2.0/util.c.addreq linuxptp-2.0/util.c

--- linuxptp-2.0/util.c.addreq	2019-03-25 11:43:55.878146767 +0100

+++ linuxptp-2.0/util.c	2019-03-25 11:44:38.215244483 +0100

@@ -78,7 +78,7 @@ int addreq(enum transport_type type, str

 	case TRANS_UDP_IPV4:

 		bufa = &a->sin.sin_addr;

 		bufb = &b->sin.sin_addr;

-		len = sizeof(a->sin);

+		len = sizeof(a->sin.sin_addr);

 		break;

 	case TRANS_IEEE_802_3:

 		bufa = &a->sll.sll_addr;