diff --git a/include/xtables.h b/include/xtables.h
index 9fdd829..b38fd73 100644
--- a/include/xtables.h
+++ b/include/xtables.h
@@ -15,6 +15,7 @@
 #include <netinet/ether.h>
 #include <netinet/in.h>
 #include <net/if.h>
+#include <linux/if_ether.h> /* ETH_ALEN */
 #include <linux/types.h>
 #include <linux/netfilter.h>
 #include <linux/netfilter/x_tables.h>