--- server/interface.c.orig	Tue Jun  4 12:28:59 1996
+++ server/interface.c	Wed Apr 22 01:23:30 1998
@@ -51,6 +51,12 @@
 #include <sys/socket.h>
 #include <sys/param.h>
 #include <net/if.h>
+#ifdef __FreeBSD__
+#include <osreldate.h>
+#if (__FreeBSD_version == 199702) || (__FreeBSD_version >= 300000)
+#include <net/if_var.h>
+#endif
+#endif
 #ifdef sun
 #include <net/nit.h>
 #include <net/nit_if.h>
