diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index 7c224cdbe56153ca7a8cab5ab66199323f083b1e..80b3c6e72cb377a6b5ee54ac1e7136b387f6c53e 100644
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -722,6 +722,7 @@ static int mrf24j40_hw_init(struct mrf24j40 *devrec)
 
 static void  mrf24j40_phy_setup(struct mrf24j40 *devrec)
 {
+	ieee802154_random_extended_addr(&devrec->hw->phy->perm_extended_addr);
 	devrec->hw->phy->current_channel = 11;
 }