diff --git a/fs/btrfs/discard.h b/fs/btrfs/discard.h
index 21a15776dac421273316740a4d1741045a1134e6..353228d62f5a1232bea3363d3f702aa9b4ee842b 100644
--- a/fs/btrfs/discard.h
+++ b/fs/btrfs/discard.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
 
 #ifndef BTRFS_DISCARD_H
 #define BTRFS_DISCARD_H