diff --git a/lib/dns/rdata.c b/lib/dns/rdata.c
index a2984129a8..107813bbe3 100644
--- a/lib/dns/rdata.c
+++ b/lib/dns/rdata.c
@@ -1254,6 +1254,8 @@ unsigned int
 dns_rdatatype_attributes(dns_rdatatype_t type)
 {
 	RDATATYPE_ATTRIBUTE_SW
+	if (type >= (dns_rdatatype_t)128 && type < (dns_rdatatype_t)255)
+		return (DNS_RDATATYPEATTR_UNKNOWN | DNS_RDATATYPEATTR_META);
 	return (DNS_RDATATYPEATTR_UNKNOWN);
 }