diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 470af8c1a4a0..ba5d1236aa17 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -204,7 +204,7 @@ struct hh_cache
 	/* cached hardware header; allow for machine alignment needs.        */
 #define HH_DATA_MOD	16
 #define HH_DATA_OFF(__len) \
-	(HH_DATA_MOD - ((__len) & (HH_DATA_MOD - 1)))
+	(HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
 #define HH_DATA_ALIGN(__len) \
 	(((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
 	unsigned long	hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];