diff --git a/platform/CMakeLists.txt b/platform/CMakeLists.txt
index 847f57787..91b1f751e 100644
--- a/platform/CMakeLists.txt
+++ b/platform/CMakeLists.txt
@@ -1,6 +1,8 @@
 # ##############################################################################
 # apps/platform/CMakeLists.txt
 #
+# 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 this work for
 # additional information regarding copyright ownership.  The ASF licenses this
diff --git a/platform/Make.defs b/platform/Make.defs
index 7e995f82d..f72db3a43 100644
--- a/platform/Make.defs
+++ b/platform/Make.defs
@@ -1,6 +1,8 @@
 ############################################################################
 # apps/platform/Make.defs
 #
+# 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
 # this work for additional information regarding copyright ownership.  The
diff --git a/platform/Makefile b/platform/Makefile
index 8260ad92c..8faa82e69 100644
--- a/platform/Makefile
+++ b/platform/Makefile
@@ -1,6 +1,8 @@
 ############################################################################
 # apps/platform/Makefile
 #
+# 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
 # this work for additional information regarding copyright ownership.  The
diff --git a/platform/bin/Makefile b/platform/bin/Makefile
index f3a01b1ea..b0d16be83 100644
--- a/platform/bin/Makefile
+++ b/platform/bin/Makefile
@@ -1,6 +1,8 @@
 ############################################################################
 # apps/platform/bin/Makefile
 #
+# 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
 # this work for additional information regarding copyright ownership.  The
diff --git a/platform/dummy/Make.defs b/platform/dummy/Make.defs
index 78274ee33..aeb565e77 100644
--- a/platform/dummy/Make.defs
+++ b/platform/dummy/Make.defs
@@ -1,6 +1,8 @@
 ############################################################################
 # apps/platform/dummy/Make.defs
 #
+# 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
 # this work for additional information regarding copyright ownership.  The
diff --git a/platform/dummy/dummy.c b/platform/dummy/dummy.c
index 229d8eb43..b3e127f35 100644
--- a/platform/dummy/dummy.c
+++ b/platform/dummy/dummy.c
@@ -1,6 +1,8 @@
 /***************************************************************************
  * apps/platform/dummy/dummy.c
  *
+ * 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
  * this work for additional information regarding copyright ownership.  The
diff --git a/platform/mikroe-stm32f4/Make.defs b/platform/mikroe-stm32f4/Make.defs
index 09dedc7b8..90662205d 100644
--- a/platform/mikroe-stm32f4/Make.defs
+++ b/platform/mikroe-stm32f4/Make.defs
@@ -1,6 +1,8 @@
 ############################################################################
 # apps/platform/mikroe-stm32f4/Make.defs
 #
+# 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
 # this work for additional information regarding copyright ownership.  The
diff --git a/platform/mikroe-stm32f4/mikroe_configdata.c b/platform/mikroe-stm32f4/mikroe_configdata.c
index 79ebc1987..b6d9bb6fc 100644
--- a/platform/mikroe-stm32f4/mikroe_configdata.c
+++ b/platform/mikroe-stm32f4/mikroe_configdata.c
@@ -1,6 +1,8 @@
 /****************************************************************************
  * apps/platform/mikroe-stm32f4/mikroe_configdata.c
  *
+ * 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
  * this work for additional information regarding copyright ownership.  The