diff --git a/lib/dns/rdataset.c b/lib/dns/rdataset.c
index a168588683..085056fde3 100644
--- a/lib/dns/rdataset.c
+++ b/lib/dns/rdataset.c
@@ -465,8 +465,8 @@ towiresorted(dns_rdataset_t *rdataset, const dns_name_t *owner_name,
 	dns_name_copy(owner_name, name, NULL);
 	dns_rdataset_getownercase(rdataset, name);
 
-	if ((owner_name->attributes & DNS_NAMEATTR_NOCOMPRESS) != 0)
-		name->attributes |= DNS_NAMEATTR_NOCOMPRESS;
+	name->attributes |= owner_name->attributes &
+		DNS_NAMEATTR_NOCOMPRESS;
 
 	do {
 		/*