diff --git a/include/linux/kernel-page-flags.h b/include/linux/kernel-page-flags.h
index f65ce09..abd20ef9 100644
--- a/include/linux/kernel-page-flags.h
+++ b/include/linux/kernel-page-flags.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef LINUX_KERNEL_PAGE_FLAGS_H
 #define LINUX_KERNEL_PAGE_FLAGS_H