diff --git a/sys/net/gnrc/network_layer/ndp/gnrc_ndp.c b/sys/net/gnrc/network_layer/ndp/gnrc_ndp.c
index 92a23e88e3..893570ece1 100644
--- a/sys/net/gnrc/network_layer/ndp/gnrc_ndp.c
+++ b/sys/net/gnrc/network_layer/ndp/gnrc_ndp.c
@@ -181,7 +181,7 @@ void gnrc_ndp_nbr_sol_handle(kernel_pid_t iface, gnrc_pktsnip_t *pkt,
             /* see https://tools.ietf.org/html/rfc6775#section-6.5.2 */
             eui64_t iid;
             ieee802154_get_iid(&iid, ar_opt->eui64.uint8, sizeof(eui64_t));
-            ipv6_addr_set_iid(&nbr_adv_dst, iid.uint64.u64);
+            ipv6_addr_set_aiid(&nbr_adv_dst, iid.uint8);
             ipv6_addr_set_link_local_prefix(&nbr_adv_dst);
         }
     }