diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index cb4c313..240d08f 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -172,7 +172,7 @@
 	possible_net_t		net;
 	struct net_device	*dev;
 	u8			flags;
-	u8			key[0];
+	u32			key[0];
 };
 
 /*