diff --git a/poky/bitbake/bin/bitbake-prserv b/poky/bitbake/bin/bitbake-prserv
index f38d2dd..1e9b6cb 100755
--- a/poky/bitbake/bin/bitbake-prserv
+++ b/poky/bitbake/bin/bitbake-prserv
@@ -1,4 +1,8 @@
 #!/usr/bin/env python3
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
 import os
 import sys,logging
 import optparse