diff --git a/sys/compat/linuxkpi/common/include/net/mac80211.h b/sys/compat/linuxkpi/common/include/net/mac80211.h
--- a/sys/compat/linuxkpi/common/include/net/mac80211.h
+++ b/sys/compat/linuxkpi/common/include/net/mac80211.h
@@ -510,9 +510,9 @@
 	uint8_t				hw_key_idx;	/* Set by drv. */
 	uint8_t				keyidx;
 	uint16_t			flags;
-	uint8_t				keylen;
-	uint8_t				key[0];
 	int8_t				link_id;	/* signed! */
+	uint8_t				keylen;
+	uint8_t				key[0];		/* Must stay last! */
 };
 
 struct ieee80211_key_seq {