diff --git a/bundles/unbound/files/unbound.conf b/bundles/unbound/files/unbound.conf
index eba526d..c25e0a3 100644
--- a/bundles/unbound/files/unbound.conf
+++ b/bundles/unbound/files/unbound.conf
@@ -1,7 +1,7 @@
 server:
     # provided by pkg_apt:unbound-anchor
     auto-trust-anchor-file: "/var/lib/unbound/root.key"
-% if node.has_bundle('jool'):
+% if node.metadata.get('unbound/dns64', node.has_bundle('jool')):
     module-config: "dns64 validator iterator"
 % else:
     module-config: "validator iterator"