<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/3846#discussion_r39500769">sys/net/gnrc/network_layer/sixlowpan/nd/gnrc_sixlowpan_nd.c</a>:</p>
<pre style='color:#555'>> @@ -170,6 +170,9 @@ kernel_pid_t gnrc_sixlowpan_nd_next_hop_l2addr(uint8_t *l2addr, uint8_t *l2addr_
>          *l2addr_len = sizeof(eui64_t);
>          memcpy(l2addr, &next_hop->u8[8], sizeof(eui64_t));
>          _revert_iid(l2addr);
> +/* in case of a border router there is no sensible way for address resolution
> + * if the interface is not given */
> +#ifndef MODULE_GNRC_SIXLOWPAN_ND_BORDER_ROUTER
</pre>
<p>done</p>

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