diff --git a/include/uapi/linux/wireless.h b/include/uapi/linux/wireless.h
index 08967b3f19c8..3c2ad5fae17f 100644
--- a/include/uapi/linux/wireless.h
+++ b/include/uapi/linux/wireless.h
@@ -835,7 +835,7 @@ struct iw_encode_ext {
 			       * individual keys */
 	__u16		alg; /* IW_ENCODE_ALG_* */
 	__u16		key_len;
-	__u8		key[0];
+	__u8		key[];
 };
 
 /* SIOCSIWMLME data */