diff --git a/poky/meta/lib/oe/prservice.py b/poky/meta/lib/oe/prservice.py
index 32dfc15..b1132cc 100644
--- a/poky/meta/lib/oe/prservice.py
+++ b/poky/meta/lib/oe/prservice.py
@@ -1,3 +1,6 @@
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
 
 def prserv_make_conn(d, check = False):
     import prserv.serv