diff --git a/lib/dns/include/dns/result.h b/lib/dns/include/dns/result.h
index 2e0aa36674..c15764ed4c 100644
--- a/lib/dns/include/dns/result.h
+++ b/lib/dns/include/dns/result.h
@@ -102,8 +102,9 @@ ISC_LANG_BEGINDECLS
 #define DNS_R_NOTVERIFIEDYET		(ISC_RESULTCLASS_DNS + 54)
 #define DNS_R_NOIDENTITY		(ISC_RESULTCLASS_DNS + 55)
 #define DNS_R_NOJOURNAL			(ISC_RESULTCLASS_DNS + 56)
+#define DNS_R_ALIAS			(ISC_RESULTCLASS_DNS + 57)
 
-#define DNS_R_NRESULTS			57	/* Number of results */
+#define DNS_R_NRESULTS			58	/* Number of results */
 
 /*
  * DNS wire format rcodes
diff --git a/lib/dns/result.c b/lib/dns/result.c
index 0dfcbd6db4..31e2ea64c4 100644
--- a/lib/dns/result.c
+++ b/lib/dns/result.c
@@ -84,6 +84,7 @@ static char *text[DNS_R_NRESULTS] = {
 	"not verified yet",			/* 54 */
 	"no identity",				/* 55 */
 	"no journal",				/* 56 */
+	"alias",				/* 57 */
 };
 
 static char *rcode_text[DNS_R_NRCODERESULTS] = {