diff --git a/block/blk-settings.c b/block/blk-settings.c
index 6375afa..ec150f8 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Functions related to setting various queue properties from drivers
  */