diff --git a/man/rules/meson.build b/man/rules/meson.build
index 19238ec0333..b8cb96ac22f 100644
--- a/man/rules/meson.build
+++ b/man/rules/meson.build
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # Do not edit. Generated by update-man-rules.py.
 # Update with:
 #     ninja -C build man/update-man-rules
diff --git a/src/shutdown/meson.build b/src/shutdown/meson.build
index a6462529aea..e1348d95d42 100644
--- a/src/shutdown/meson.build
+++ b/src/shutdown/meson.build
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 systemd_shutdown_sources = files('''
         shutdown.c
         umount.c
diff --git a/tools/update-man-rules.py b/tools/update-man-rules.py
index 9e1660c1238..8221a37d9a9 100755
--- a/tools/update-man-rules.py
+++ b/tools/update-man-rules.py
@@ -47,6 +47,8 @@ def mjoin(files):
     return ' \\\n\t'.join(sorted(files) or '#')
 
 MESON_HEADER = '''\
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # Do not edit. Generated by update-man-rules.py.
 # Update with:
 #     ninja -C build man/update-man-rules