diff --git a/roles/nsd/templates/zones/mateu.be.zone.j2 b/roles/nsd/templates/zones/mateu.be.zone.j2
index b07667d..da4ceb1 100644
--- a/roles/nsd/templates/zones/mateu.be.zone.j2
+++ b/roles/nsd/templates/zones/mateu.be.zone.j2
@@ -8,7 +8,9 @@ $TTL 86400
 			)
 
 {% for server in groups['nsdservers'] %}
-		IN	NS	{{ server }}.
+{% for ip_family in ['v4', 'v6'] %}
+		IN	NS	{{ server | regex_replace('^([a-z0-9-]+)\\.', '\\1-' ~ ip_family ~ '.') }}.
+{% endfor %}
 {% endfor %}
 
 $ORIGIN {{ item.name }}.
@@ -26,7 +28,9 @@ ciol        IN A     109.190.68.133
 derdriu        IN A     10.233.212.77
 dkim._domainkey        IN TXT     "v=DKIM1; k=rsa; t=s; s=email; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCv3kGIw5015Q35LLbkGwaBE+wC0PseodezDdkoGwzRsazEWINv1bg0mCIjtDbXLpv5VgRSynRyB+764i15DoFJp6mabcHlXxQVBWMClAtCJ9+Fn6SEwQjFbQeuFVQKH3xMwIq0S+ggP7qhFTaiLBn909Fi8oEMXGvqbBSlvoaeJwIDAQAB"
 dns1.dmz        IN A     82.66.135.228
+dns1-v4.dmz        IN A     82.66.135.228
 dns1.dmz        IN AAAA     2a01:e0a:9bd:2811::16
+dns1-v6.dmz        IN AAAA     2a01:e0a:9bd:2811::16
 dom        IN A     10.233.212.15
 dom.dmz        IN A     82.66.135.228
 dom.dmz        IN AAAA     2a01:e0a:9bd:2811::15
@@ -63,7 +67,9 @@ munin.dmz        IN AAAA     2a01:e0a:9bd:2811::12
 nfs        IN A     10.233.212.60
 nintendojo.fr._report._dmarc        IN TXT     "v=DMARC1;"
 nsd-master1.ext        IN A     51.158.238.190
+nsd-master1-v4.ext        IN A     51.158.238.190
 nsd-master1.ext        IN AAAA     2001:bc8:5090:5bb:dc00:ff:fe20:8869
+nsd-master1-v6.ext        IN AAAA     2001:bc8:5090:5bb:dc00:ff:fe20:8869
 p.libertus.eu._report._dmarc        IN TXT     "v=DMARC1;"
 pipoworld.fr._report._dmarc        IN TXT     "v=DMARC1;"
 pt1.dmz        IN A     82.66.135.228