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-rw-r--r--sound/usb/helper.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/usb/helper.h b/sound/usb/helper.h
index 805c300dd004..4463e6d6dcb3 100644
--- a/sound/usb/helper.h
+++ b/sound/usb/helper.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __USBAUDIO_HELPER_H
#define __USBAUDIO_HELPER_H