diff --git a/poky/bitbake/lib/bblayers/layerindex.py b/poky/bitbake/lib/bblayers/layerindex.py
index b2ff226..57cd902 100644
--- a/poky/bitbake/lib/bblayers/layerindex.py
+++ b/poky/bitbake/lib/bblayers/layerindex.py
@@ -1,3 +1,7 @@
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
 import layerindexlib
 
 import argparse