diff --git a/lib/lwres/getnameinfo.c b/lib/lwres/getnameinfo.c
index 09af2333bb..44a9ab81e1 100644
--- a/lib/lwres/getnameinfo.c
+++ b/lib/lwres/getnameinfo.c
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: getnameinfo.c,v 1.28 2001/01/09 21:59:20 bwelling Exp $ */
+/* $Id: getnameinfo.c,v 1.29 2001/03/05 23:14:03 bwelling Exp $ */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -258,7 +258,8 @@ lwres_getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
 			(void) lwres_conf_parse(lwrctx, lwres_resolv_conf);
 
 		if (n == 0)
-			n = lwres_getnamebyaddr(lwrctx, lwf, afd->a_addrlen,
+			n = lwres_getnamebyaddr(lwrctx, lwf,
+						(lwres_uint16_t)afd->a_addrlen,
 						addr, &by);
 		if (n == 0) {
 			if (flags & NI_NOFQDN) {