diff --git a/src/hnbgw.c b/src/hnbgw.c
index e5c8c7a..0301cd6 100644
--- a/src/hnbgw.c
+++ b/src/hnbgw.c
@@ -152,7 +152,7 @@
 	}
 
 	rc = osmo_sock_init_ofd(&g_hnb_gw.listen_fd, AF_INET, SOCK_STREAM,
-			   IPPROTO_SCTP, "127.0.0.1",
+			   IPPROTO_SCTP, NULL,
 			   g_hnb_gw.config.iuh_listen_port, OSMO_SOCK_F_BIND);
 	if (rc < 0) {
 		perror("Error binding Iuh port");