diff --git a/drivers/pnp/support.c b/drivers/pnp/support.c
index f5beb24..e4f53d3 100644
--- a/drivers/pnp/support.c
+++ b/drivers/pnp/support.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * support.c - standard functions for the use of pnp protocol drivers
  *