diff --git a/lib/libc/net/Makefile.inc b/lib/libc/net/Makefile.inc
index 0413b4665c56..7ce97a9326c8 100644
--- a/lib/libc/net/Makefile.inc
+++ b/lib/libc/net/Makefile.inc
@@ -7,6 +7,7 @@ SRCS+=	gethostnamadr.c getnetbyaddr.c getnetbyname.c getnetent.c \
 	getproto.c getprotoent.c getprotoname.c getservbyname.c \
 	getservbyport.c getservent.c herror.c inet_addr.c inet_lnaof.c \
 	inet_makeaddr.c inet_netof.c inet_network.c inet_ntoa.c \
+	iso_addr.c ns_addr.c ns_ntoa.c \
 	iso_addr.c linkaddr.c ns_addr.c ns_ntoa.c rcmd.c recv.c res_comp.c \
 	res_debug.c res_init.c res_mkquery.c res_query.c res_send.c \
 	send.c sethostent.c