diff --git a/lib/usercopy.c b/lib/usercopy.c
index f5d9f08..15e2e6f 100644
--- a/lib/usercopy.c
+++ b/lib/usercopy.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/uaccess.h>
 
 /* out-of-line parts */