diff -Nur busybox-1.20.2.orig/networking/ifplugd.c busybox-1.20.2/networking/ifplugd.c
--- busybox-1.20.2.orig/networking/ifplugd.c	2012-07-02 16:08:25.000000000 +0200
+++ busybox-1.20.2/networking/ifplugd.c	2013-09-22 11:43:24.000000000 +0200
@@ -34,6 +34,7 @@
 #include "libbb.h"
 
 #include "fix_u32.h"
+#include <paths.h>
 #include <linux/if.h>
 #include <linux/mii.h>
 #include <linux/ethtool.h>