--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -2088,6 +2088,7 @@ static int mv88e6xxx_port_fdb_add(struct
 	struct mv88e6xxx_chip *chip = ds->priv;
 	int err;
 
+	vid = vid ? : 1;
 	mv88e6xxx_reg_lock(chip);
 	err = mv88e6xxx_port_db_load_purge(chip, port, addr, vid,
 					   MV88E6XXX_G1_ATU_DATA_STATE_UC_STATIC);
@@ -2102,6 +2103,7 @@ static int mv88e6xxx_port_fdb_del(struct
 	struct mv88e6xxx_chip *chip = ds->priv;
 	int err;
 
+	vid = vid ? : 1;
 	mv88e6xxx_reg_lock(chip);
 	err = mv88e6xxx_port_db_load_purge(chip, port, addr, vid, 0);
 	mv88e6xxx_reg_unlock(chip);
