diff --git a/sys/net/if_vlan.c b/sys/net/if_vlan.c
--- a/sys/net/if_vlan.c
+++ b/sys/net/if_vlan.c
@@ -1106,11 +1106,8 @@
 			return error;
 		vid = vlr.vlr_tag;
 		proto = vlr.vlr_proto;
-
-#ifdef COMPAT_FREEBSD12
 		if (proto == 0)
 			proto = ETHERTYPE_VLAN;
-#endif
 		p = ifunit_ref(vlr.vlr_parent);
 		if (p == NULL)
 			return (ENXIO);
@@ -2262,10 +2259,8 @@
 			error = ENOENT;
 			break;
 		}
-#ifdef COMPAT_FREEBSD12
 		if (vlr.vlr_proto == 0)
 			vlr.vlr_proto = ETHERTYPE_VLAN;
-#endif
 		oldmtu = ifp->if_mtu;
 		error = vlan_config(ifv, p, vlr.vlr_tag, vlr.vlr_proto);
 		if_rele(p);