diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index 8b07f83d48ad..e47dcb9d1e91 100644
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -578,6 +578,7 @@ data_sock_getname(struct socket *sock, struct sockaddr *addr,
 	lock_sock(sk);
 
 	*addr_len = sizeof(*maddr);
+	maddr->family = AF_ISDN;
 	maddr->dev = _pms(sk)->dev->id;
 	maddr->channel = _pms(sk)->ch.nr;
 	maddr->sapi = _pms(sk)->ch.addr & 0xff;