diff --git a/etc/unbound/unbound.conf.d/dot-mullvad-adblock.conf b/etc/unbound/unbound.conf.d/dot-mullvad-adblock.conf
index 360bae8e..d9fc117f 100644
--- a/etc/unbound/unbound.conf.d/dot-mullvad-adblock.conf
+++ b/etc/unbound/unbound.conf.d/dot-mullvad-adblock.conf
@@ -7,6 +7,6 @@ server:
 forward-zone:
     name: "."
     forward-tls-upstream: yes
-    forward-addr: 2a07:e340::3#adblock.doh.mullvad.net
+    forward-addr: 2a07:e340::3@853#adblock.doh.mullvad.net
     forward-addr: 194.242.2.3@853#adblock.doh.mullvad.net
     forward-addr: 193.19.108.3@853#adblock.doh.mullvad.net