--- ppp-2.4.7/pppd/plugins/rp-pppoe/plugin.c.orig	2014-08-09 21:31:39.000000000 +0900
+++ ppp-2.4.7/pppd/plugins/rp-pppoe/plugin.c	2017-06-16 07:39:27.523735557 +0900
@@ -49,6 +49,8 @@
 #include <net/ethernet.h>
 #include <net/if_arp.h>
 #include <linux/ppp_defs.h>
+#define _LINUX_IN_H
+#define _LINUX_IN6_H
 #include <linux/if_pppox.h>
 
 #ifndef _ROOT_PATH