Index: sbin/ifconfig/af_inet.c
===================================================================
--- sbin/ifconfig/af_inet.c
+++ sbin/ifconfig/af_inet.c
@@ -78,7 +78,7 @@
 	sin = (struct sockaddr_in *)ifa->ifa_netmask;
 	if (sin == NULL)
 		sin = &null_sin;
-	printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr));
+	printf("netmask %s ", inet_ntoa(sin->sin_addr));
 
 	if (ifa->ifa_flags & IFF_BROADCAST) {
 		sin = (struct sockaddr_in *)ifa->ifa_broadaddr;