diff --git a/inertial/Make.defs b/inertial/Make.defs
index d19af3397..d5c8f4ca5 100644
--- a/inertial/Make.defs
+++ b/inertial/Make.defs
@@ -1,7 +1,7 @@
 ############################################################################
 # apps/inertial/Make.defs
 #
-# SPDX-License-Identifier: BSD-3-Clause
+# SPDX-License-Identifier: Apache-2.0
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
diff --git a/inertial/Makefile b/inertial/Makefile
index e12c1d623..1d48a1ae3 100644
--- a/inertial/Makefile
+++ b/inertial/Makefile
@@ -1,7 +1,7 @@
 ############################################################################
 # apps/inertial/Makefile
 #
-# SPDX-License-Identifier: BSD-3-Clause
+# SPDX-License-Identifier: Apache-2.0
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
diff --git a/inertial/madgwick/Make.defs b/inertial/madgwick/Make.defs
index e16d25d84..bb48895dc 100644
--- a/inertial/madgwick/Make.defs
+++ b/inertial/madgwick/Make.defs
@@ -1,7 +1,7 @@
 ############################################################################
 # apps/inertial/madgwick/Make.defs
 #
-# SPDX-License-Identifier: BSD-3-Clause
+# SPDX-License-Identifier: Apache-2.0
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
diff --git a/inertial/madgwick/Makefile b/inertial/madgwick/Makefile
index 38dac5227..909d67b97 100644
--- a/inertial/madgwick/Makefile
+++ b/inertial/madgwick/Makefile
@@ -1,7 +1,7 @@
 ############################################################################
 # apps/inertial/madgwick/Makefile
 #
-# SPDX-License-Identifier: BSD-3-Clause
+# SPDX-License-Identifier: Apache-2.0
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with