diff -Naur pppd.orig/plugins/pppoe/plugin.c pppd/plugins/pppoe/plugin.c
--- pppd.orig/plugins/pppoe/plugin.c	2023-06-30 13:25:58.798782323 +0200
+++ pppd/plugins/pppoe/plugin.c	2023-06-30 13:50:23.150026201 +0200
@@ -46,6 +46,8 @@
 #include <signal.h>
 #include <net/if_arp.h>
 #include <linux/ppp_defs.h>
+#define _LINUX_IN_H
+#define _LINUX_IN6_H
 #include <linux/if_pppox.h>
 
 #include <pppd/pppd.h>