diff --git a/net/sunrpc/timer.c b/net/sunrpc/timer.c
index 08881d0..81ae35b 100644
--- a/net/sunrpc/timer.c
+++ b/net/sunrpc/timer.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/net/sunrpc/timer.c
  *