diff --git a/networking/ifplugd.c b/networking/ifplugd.c
index 1e6c562e0..f0defb5c8 100644
--- a/networking/ifplugd.c
+++ b/networking/ifplugd.c
@@ -58,6 +58,10 @@
 #define __user
 #include <linux/wireless.h>
 
+#ifndef ETH_ALEN
+# define ETH_ALEN  6
+#endif
+
 /*
 From initial port to busybox, removed most of the redundancy by
 converting implementation of a polymorphic interface to the strict