diff --git a/usr.sbin/arp/arp.c b/usr.sbin/arp/arp.c
index 08698c7bc29..f018baa2679 100644
--- a/usr.sbin/arp/arp.c
+++ b/usr.sbin/arp/arp.c
@@ -299,6 +299,7 @@ valid_type(int type)
 	switch (type) {
 	case IFT_ETHER:
 	case IFT_FDDI:
+	case IFT_IEEE1394:
 	case IFT_INFINIBAND:
 	case IFT_ISO88023:
 	case IFT_ISO88024: