diff --git a/poky/meta/lib/rootfspostcommands.py b/poky/meta/lib/rootfspostcommands.py
index 4742e06..fdb9f5b 100644
--- a/poky/meta/lib/rootfspostcommands.py
+++ b/poky/meta/lib/rootfspostcommands.py
@@ -1,3 +1,7 @@
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
 import os
 
 def sort_file(filename, mapping):