diff --git a/sim/mcuboot-sys/src/api.rs b/sim/mcuboot-sys/src/api.rs
index a474e8f..a88cfcf 100644
--- a/sim/mcuboot-sys/src/api.rs
+++ b/sim/mcuboot-sys/src/api.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2017-2019 Linaro LTD
+// Copyright (c) 2018-2019 JUUL Labs
+//
+// SPDX-License-Identifier: Apache-2.0
+
 //! HAL api for MyNewt applications
 
 use crate::area::CAreaDesc;
diff --git a/sim/mcuboot-sys/src/area.rs b/sim/mcuboot-sys/src/area.rs
index 779157a..dc05e39 100644
--- a/sim/mcuboot-sys/src/area.rs
+++ b/sim/mcuboot-sys/src/area.rs
@@ -1,3 +1,9 @@
+// Copyright (c) 2017-2019 Linaro LTD
+// Copyright (c) 2018-2019 JUUL Labs
+// Copyright (c) 2019 Arm Limited
+//
+// SPDX-License-Identifier: Apache-2.0
+
 //! Describe flash areas.
 
 use simflash::{Flash, SimFlash, Sector};
diff --git a/sim/mcuboot-sys/src/c.rs b/sim/mcuboot-sys/src/c.rs
index 6df89e4..61276e2 100644
--- a/sim/mcuboot-sys/src/c.rs
+++ b/sim/mcuboot-sys/src/c.rs
@@ -1,4 +1,10 @@
-/// Interface wrappers to C API entering to the bootloader
+// Copyright (c) 2017-2019 Linaro LTD
+// Copyright (c) 2017-2019 JUUL Labs
+// Copyright (c) 2019 Arm Limited
+//
+// SPDX-License-Identifier: Apache-2.0
+
+//! Interface wrappers to C API entering to the bootloader
 
 use crate::area::AreaDesc;
 use simflash::SimMultiFlash;
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;