diff --git a/sim/mcuboot-sys/src/lib.rs b/sim/mcuboot-sys/src/lib.rs
index 351666e..8acb246 100644
--- a/sim/mcuboot-sys/src/lib.rs
+++ b/sim/mcuboot-sys/src/lib.rs
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 Linaro LTD
+//
+// SPDX-License-Identifier: Apache-2.0
+
 mod area;
 pub mod c;