diff --git a/net/ieee802154/6lowpan/tx.c b/net/ieee802154/6lowpan/tx.c
index 98acf7319754..2597abbf7f4b 100644
--- a/net/ieee802154/6lowpan/tx.c
+++ b/net/ieee802154/6lowpan/tx.c
@@ -190,6 +190,7 @@ err:
 
 static int lowpan_header(struct sk_buff *skb, struct net_device *dev)
 {
+	struct wpan_dev *wpan_dev = lowpan_dev_info(dev)->real_dev->ieee802154_ptr;
 	struct ieee802154_addr sa, da;
 	struct ieee802154_mac_cb *cb = mac_cb_init(skb);
 	struct lowpan_addr_info info;
@@ -207,7 +208,7 @@ static int lowpan_header(struct sk_buff *skb, struct net_device *dev)
 
 	/* prepare wpan address data */
 	sa.mode = IEEE802154_ADDR_LONG;
-	sa.pan_id = lowpan_dev_info(dev)->real_dev->ieee802154_ptr->pan_id;
+	sa.pan_id = wpan_dev->pan_id;
 	sa.extended_addr = ieee802154_devaddr_from_raw(saddr);
 
 	/* intra-PAN communications */
@@ -223,7 +224,7 @@ static int lowpan_header(struct sk_buff *skb, struct net_device *dev)
 	} else {
 		da.mode = IEEE802154_ADDR_LONG;
 		da.extended_addr = ieee802154_devaddr_from_raw(daddr);
-		cb->ackreq = true;
+		cb->ackreq = wpan_dev->frame_retries >= 0;
 	}
 
 	return dev_hard_header(skb, lowpan_dev_info(dev)->real_dev,