diff --git a/data/dns/blw.dn42 b/data/dns/blw.dn42
index 830ebf1ca..f55a6a470 100644
--- a/data/dns/blw.dn42
+++ b/data/dns/blw.dn42
@@ -3,5 +3,7 @@ admin-c:            PAIZI-DN42
 tech-c:             PAIZI-DN42
 mnt-by:             BLING-MNT
 nserver:            ns1.blw.dn42 172.20.21.100
+nserver:            ns1.blw.dn42 fd54:4355:b6ac::100
 nserver:            ns2.blw.dn42 172.20.21.101
+nserver:            ns2.blw.dn42 fd54:4355:b6ac::101
 source:             DN42