diff --git a/arch/sim/src/sim/up_netdriver.c b/arch/sim/src/sim/up_netdriver.c
index 310c91b707..e1b6ecaf22 100644
--- a/arch/sim/src/sim/up_netdriver.c
+++ b/arch/sim/src/sim/up_netdriver.c
@@ -1,10 +1,24 @@
 /****************************************************************************
  * arch/sim/src/sim/up_netdriver.c
  *
- *   Copyright (C) 2007, 2009-2012, 2015-2016 Gregory Nutt.
- *   All rights reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
  *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
  * Based on code from uIP which also has a BSD-like license:
  *
  *   Copyright (c) 2001, Adam Dunkels.
diff --git a/arch/sim/src/sim/up_tapdev.c b/arch/sim/src/sim/up_tapdev.c
index 13ecc1b545..f1fcd1aaaa 100644
--- a/arch/sim/src/sim/up_tapdev.c
+++ b/arch/sim/src/sim/up_tapdev.c
@@ -1,9 +1,24 @@
 /****************************************************************************
  * arch/sim/src/sim/up_tapdev.c
  *
- *   Copyright (C) 2007-2009, 2011, 2016 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
  *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
  * Based on code from uIP which also has a BSD-like license:
  *
  *   Copyright (c) 2001, Adam Dunkels.
diff --git a/arch/sim/src/sim/up_wpcap.c b/arch/sim/src/sim/up_wpcap.c
index f988ed6daf..2d0b0e0493 100644
--- a/arch/sim/src/sim/up_wpcap.c
+++ b/arch/sim/src/sim/up_wpcap.c
@@ -1,8 +1,24 @@
 /****************************************************************************
  * arch/sim/src/sim/up_wpcap.c
  *
- *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
  *
  * Based on code from uIP which also has a BSD-like license:
  *