diff --git a/poky/bitbake/lib/bblayers/common.py b/poky/bitbake/lib/bblayers/common.py
index 98515ce..c5657d3 100644
--- a/poky/bitbake/lib/bblayers/common.py
+++ b/poky/bitbake/lib/bblayers/common.py
@@ -1,3 +1,7 @@
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
 import argparse
 import logging
 import os