diff --git a/poky/meta/lib/oe/sdk.py b/poky/meta/lib/oe/sdk.py
index 878ee16..b4fbdb7 100644
--- a/poky/meta/lib/oe/sdk.py
+++ b/poky/meta/lib/oe/sdk.py
@@ -1,3 +1,7 @@
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
 from abc import ABCMeta, abstractmethod
 from oe.utils import execute_pre_post_process
 from oe.manifest import *