diff --git a/.lgtm.yml b/.lgtm.yml
index e27fa169c5..86fd0e742c 100644
--- a/.lgtm.yml
+++ b/.lgtm.yml
@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 # Explicitly enable certain checks which are hidden by default
 queries: