diff --git a/poky/bitbake/lib/bblayers/action.py b/poky/bitbake/lib/bblayers/action.py
index a3f658f..d6459d6 100644
--- a/poky/bitbake/lib/bblayers/action.py
+++ b/poky/bitbake/lib/bblayers/action.py
@@ -1,3 +1,7 @@
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
 import fnmatch
 import logging
 import os