diff --git a/drivers/staging/greybus/control.h b/drivers/staging/greybus/control.h
index 643ddb9e0f92..9eae2726ba3d 100644
--- a/drivers/staging/greybus/control.h
+++ b/drivers/staging/greybus/control.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Greybus CPort control protocol
  *