diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index ebc8035..c0f12ad 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *      sd.c Copyright (C) 1992 Drew Eckhardt
  *           Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale