<p></p>
<p><b>@JKRhb</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/15508#discussion_r531602449">tests/gnrc_dhcpv6_client_6lbr/Makefile</a>:</p>
<pre style='color:#555'>> +ifdef MUD_URL
+  QUOTATION = "\""
+  CFLAGS += -DMUD_URL=$(QUOTATION)$(MUD_URL)$(QUOTATION)
+endif
</pre>
<p>Thank you once more! I tried to implement your suggestion in <a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/RIOT-OS/RIOT/commit/382c97260830e5666d7959650399a462808f0fd6/hovercard" href="https://github.com/RIOT-OS/RIOT/commit/382c97260830e5666d7959650399a462808f0fd6"><tt>382c972</tt></a> -- I hope it's the correct way to realize a config option.</p>

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