diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 9f53904..e7f61de 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -584,6 +584,10 @@
 
 		mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA;
 
+		/* request acknowledgment when possible */
+		if (!lowpan_is_addr_broadcast(daddr))
+			mac_cb(skb)->flags |= MAC_CB_FLAG_ACKREQ;
+
 		return dev_hard_header(skb, lowpan_dev_info(dev)->real_dev,
 				type, (void *)&da, (void *)&sa, skb->len);
 	}