diff --git a/sim/src/lib.rs b/sim/src/lib.rs
index dba7cb0..4e2f6c3 100644
--- a/sim/src/lib.rs
+++ b/sim/src/lib.rs
@@ -1,3 +1,9 @@
+// Copyright (c) 2017-2019 Linaro LTD
+// Copyright (c) 2017-2019 JUUL Labs
+// Copyright (c) 2019 Arm Limited
+//
+// SPDX-License-Identifier: Apache-2.0
+
 use docopt::Docopt;
 use log::{warn, error};
 use std::{