diff -r c326f55c74bd toys/pending/ifconfig.c
--- a/toys/pending/ifconfig.c	Sat Apr 20 17:25:41 2013 +0200
+++ b/toys/pending/ifconfig.c	Sun Apr 21 16:50:39 2013 -0700
@@ -35,6 +35,7 @@
 #include <net/if.h>
 #include <net/if_arp.h>
 #include <net/ethernet.h>
+#include <sys/un.h>
 
 GLOBALS(
   void *if_list;