diff --git a/drivers/usb/phy/phy-fsl-usb.h b/drivers/usb/phy/phy-fsl-usb.h
index 43d410f6641b..fbcc28ad9964 100644
--- a/drivers/usb/phy/phy-fsl-usb.h
+++ b/drivers/usb/phy/phy-fsl-usb.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
 /* Copyright (C) 2007,2008 Freescale Semiconductor, Inc. */
 
 #include <linux/usb/otg-fsm.h>
diff --git a/drivers/usb/phy/phy-mv-usb.h b/drivers/usb/phy/phy-mv-usb.h
index 96701a1229ad..5d5c0abb0c3a 100644
--- a/drivers/usb/phy/phy-mv-usb.h
+++ b/drivers/usb/phy/phy-mv-usb.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
  */