diff --git a/lib/dns/include/dns/rdataset.h b/lib/dns/include/dns/rdataset.h
index 31bcd15f14..900a545454 100644
--- a/lib/dns/include/dns/rdataset.h
+++ b/lib/dns/include/dns/rdataset.h
@@ -673,7 +673,7 @@ dns_rdataset_trimttl(dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset,
 
 const char *
 dns_trust_totext(dns_trust_t trust);
-/*
+/*%<
  * Display trust in textual form.
  */