--- ppp-2.4.7.orig/pppd/plugins/rp-pppoe/plugin.c	2014-08-09 14:31:39.000000000 +0200
+++ ppp-2.4.7/pppd/plugins/rp-pppoe/plugin.c	2021-11-04 04:11:17.756625845 +0100
@@ -49,6 +49,8 @@ static char const RCSID[] =
 #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