diff --git a/poky/meta/lib/oe/rootfs.py b/poky/meta/lib/oe/rootfs.py
index b7c0b9c..9358f56 100644
--- a/poky/meta/lib/oe/rootfs.py
+++ b/poky/meta/lib/oe/rootfs.py
@@ -1,3 +1,6 @@
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
 from abc import ABCMeta, abstractmethod
 from oe.utils import execute_pre_post_process
 from oe.package_manager import *