diff --git a/templates/named.conf.options.j2 b/templates/named.conf.options.j2
index f59c3b5..5473a05 100644
--- a/templates/named.conf.options.j2
+++ b/templates/named.conf.options.j2
@@ -130,8 +130,8 @@ dnstap {
 {% for dns64 in option.dns64 if option.dns64 is sequence %}
 dns64 {{ dns64.netprefix }} {
 {% filter indent(bind9_config_indent, true) %}
-{{ ('break-dnssec ' + dns64.break_dnssec | functions.named_boolean + ';\n') if dns64.break_dnssec is defined and dns64.break_dnssec is boolean -}}
-{{ ('recursive-only ' + dns64.recursive_only | functions.named_boolean + ';\n') if dns64.recursive_only is defined and dns64.recursive_only is boolean -}}
+{{ ('break-dnssec ' + functions.named_boolean(dns64.break_dnssec) + ';\n') if dns64.break_dnssec is defined and dns64.break_dnssec is boolean -}}
+{{ ('recursive-only ' + functions.named_boolean(dns64.recursive_only) + ';\n') if dns64.recursive_only is defined and dns64.recursive_only is boolean -}}
 {{ ('suffix ' + dns64.suffix + ';\n') if dns64.suffix is defined and dns64.suffix -}}
 {{ ("clients {\n" + functions.simple_item_list(dns64.clients) + "};\n") if dns64.clients is defined and dns64.clients -}}
 {{ ("exclude {\n" + functions.simple_item_list(dns64.exclude) + "};\n") if dns64.exclude is defined and dns64.exclude -}}
@@ -172,7 +172,7 @@ default-primaries
 {{ functions.list_address_port_key_tls(catalog_zone.default_primaries.primaries) }}}
 {% endif %}
 {{ ('zone-directory "' + catalog_zone.zone_directory + '"') if catalog_zone.zone_directory is defined and catalog_zone.zone_directory }}
-{{ ('in-memory ' + (catalog_zone.in_memory | functions.named_boolean ) | string) if catalog_zone.in_memory is defined and catalog_zone.in_memory is boolean }}
+{{ ('in-memory ' + (functions.named_boolean(catalog_zone.in_memory)) | string) if catalog_zone.in_memory is defined and catalog_zone.in_memory is boolean }}
 {{ ('min-update-interval ' + catalog_zone.min_update_interval | string) if catalog_zone.min_update_interval is defined and catalog_zone.min_update_interval}};
 {% endfilter %}
 {% endfor %}};