--- a/main.c
+++ b/main.c
@@ -560,6 +560,7 @@ static void usage(void)
 	fprintf(stderr, "          session_id ID peer_session_id ID\n");
 	fprintf(stderr, "          [ cookie HEXSTR ] [ peer_cookie HEXSTR ]\n");
 	fprintf(stderr, "          [ offset OFFSET ] [ peer_offset OFFSET ]\n");
+	fprintf(stderr, "          [ ifname IFNAME ]\n");
 	fprintf(stderr, "       %s del tunnel tunnel_id ID\n", L2TP_CMD_ROOT);
 	fprintf(stderr, "       %s del session tunnel_id ID session_id ID\n", L2TP_CMD_ROOT);
 	fprintf(stderr, "       %s show tunnel [ tunnel_id ID ]\n", L2TP_CMD_ROOT);
@@ -671,6 +672,9 @@ static int parse_args(int argc, char **a
 			p->peer_cookie_len = slen / 2;
 			if (hex2mem(*argv, p->peer_cookie, p->peer_cookie_len) < 0)
 				invarg("cookie must be a hex string\n", *argv);
+		} else if (strcmp(*argv, "ifname") == 0) {
+			NEXT_ARG();
+			p->ifname = *argv;
 		} else if (strcmp(*argv, "tunnel") == 0) {
 			p->tunnel = 1;
 		} else if (strcmp(*argv, "session") == 0) {