diff --git a/Application.mk b/Application.mk
index b73d1a684..e99300644 100644
--- a/Application.mk
+++ b/Application.mk
@@ -1,6 +1,8 @@
 ############################################################################
 # apps/Application.mk
 #
+# 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/CMakeLists.txt b/CMakeLists.txt
index f35203b3e..e36d9f68f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,8 @@
 # ##############################################################################
 # apps/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/Directory.mk b/Directory.mk
index 87a80d7bd..ff42d2390 100644
--- a/Directory.mk
+++ b/Directory.mk
@@ -1,6 +1,8 @@
 ############################################################################
 # apps/Directory.mk
 #
+# 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/Make.defs b/Make.defs
index 695dfa2be..ab79ce71c 100644
--- a/Make.defs
+++ b/Make.defs
@@ -1,6 +1,8 @@
 ############################################################################
 # apps/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/Makefile b/Makefile
index b2b90c7c4..5a3570538 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,8 @@
 ############################################################################
 # apps/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/config.nims b/config.nims
index 1bf0ac25b..2d96ca390 100644
--- a/config.nims
+++ b/config.nims
@@ -1,6 +1,8 @@
 ############################################################################
 # apps/config.nims
 #
+# 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