diff --git a/hw/xen/xen_pt.h b/hw/xen/xen_pt.h
index 31bcfdf..d3180bb 100644
--- a/hw/xen/xen_pt.h
+++ b/hw/xen/xen_pt.h
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2007, Neocleus Corporation.
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ * Alex Novik <alex@neocleus.com>
+ * Allen Kay <allen.m.kay@intel.com>
+ * Guy Zana <guy@neocleus.com>
+ */
 #ifndef XEN_PT_H
 #define XEN_PT_H