diff --git a/subsys/modbus/modbus_client.c b/subsys/modbus/modbus_client.c
index 62ebe157846..e404392499b 100644
--- a/subsys/modbus/modbus_client.c
+++ b/subsys/modbus/modbus_client.c
@@ -12,7 +12,7 @@
  *
  *      Copyright 2003-2020 Silicon Laboratories Inc. www.silabs.com
  *
- *                   SPDX-License-Identifier: APACHE-2.0
+ *                   SPDX-License-Identifier: Apache-2.0
  *
  * This software is subject to an open source license and is distributed by
  *  Silicon Laboratories Inc. pursuant to the terms of the Apache License,
diff --git a/subsys/modbus/modbus_internal.h b/subsys/modbus/modbus_internal.h
index 8b40f7c6476..af2d7ac6e3d 100644
--- a/subsys/modbus/modbus_internal.h
+++ b/subsys/modbus/modbus_internal.h
@@ -13,7 +13,7 @@
  *
  *      Copyright 2003-2020 Silicon Laboratories Inc. www.silabs.com
  *
- *                   SPDX-License-Identifier: APACHE-2.0
+ *                   SPDX-License-Identifier: Apache-2.0
  *
  * This software is subject to an open source license and is distributed by
  *  Silicon Laboratories Inc. pursuant to the terms of the Apache License,
diff --git a/subsys/modbus/modbus_serial.c b/subsys/modbus/modbus_serial.c
index 2a96ac37b6a..a4a4d29e870 100644
--- a/subsys/modbus/modbus_serial.c
+++ b/subsys/modbus/modbus_serial.c
@@ -13,7 +13,7 @@
  *
  *      Copyright 2003-2020 Silicon Laboratories Inc. www.silabs.com
  *
- *                   SPDX-License-Identifier: APACHE-2.0
+ *                   SPDX-License-Identifier: Apache-2.0
  *
  * This software is subject to an open source license and is distributed by
  *  Silicon Laboratories Inc. pursuant to the terms of the Apache License,
diff --git a/subsys/modbus/modbus_server.c b/subsys/modbus/modbus_server.c
index 9b4035f9bae..2dd980f3d8e 100644
--- a/subsys/modbus/modbus_server.c
+++ b/subsys/modbus/modbus_server.c
@@ -12,7 +12,7 @@
  *
  *      Copyright 2003-2020 Silicon Laboratories Inc. www.silabs.com
  *
- *                   SPDX-License-Identifier: APACHE-2.0
+ *                   SPDX-License-Identifier: Apache-2.0
  *
  * This software is subject to an open source license and is distributed by
  *  Silicon Laboratories Inc. pursuant to the terms of the Apache License,