diff --git a/src/libsystemd/sd-netlink/nfnl-message.c b/src/libsystemd/sd-netlink/nfnl-message.c
index 6c11ae6ee5..47e107a313 100644
--- a/src/libsystemd/sd-netlink/nfnl-message.c
+++ b/src/libsystemd/sd-netlink/nfnl-message.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1+ */
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include <netinet/in.h>
 #include <linux/if_addrlabel.h>
diff --git a/src/shared/firewall-util-iptables.c b/src/shared/firewall-util-iptables.c
index ab3438843b..fec3000e75 100644
--- a/src/shared/firewall-util-iptables.c
+++ b/src/shared/firewall-util-iptables.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1+ */
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 /* Temporary work-around for broken glibc vs. linux kernel header definitions
  * This is already fixed upstream, remove this when distributions have updated.
diff --git a/src/shared/firewall-util-nft.c b/src/shared/firewall-util-nft.c
index d48811a58a..98dd7ff3b4 100644
--- a/src/shared/firewall-util-nft.c
+++ b/src/shared/firewall-util-nft.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1+ */
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include <arpa/inet.h>
 #include <endian.h>
diff --git a/src/shared/firewall-util-private.h b/src/shared/firewall-util-private.h
index f034af180e..59e1e502fd 100644
--- a/src/shared/firewall-util-private.h
+++ b/src/shared/firewall-util-private.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1+ */
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
 #include <stdbool.h>
diff --git a/src/systemctl/systemctl-mount.c b/src/systemctl/systemctl-mount.c
index 646f9b77df..04e626550d 100644
--- a/src/systemctl/systemctl-mount.c
+++ b/src/systemctl/systemctl-mount.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1+ */
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include "bus-error.h"
 #include "bus-locator.h"
diff --git a/src/systemctl/systemctl-mount.h b/src/systemctl/systemctl-mount.h
index db0343f831..60d6875d82 100644
--- a/src/systemctl/systemctl-mount.h
+++ b/src/systemctl/systemctl-mount.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1+ */
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
 int mount_bind(int argc, char *argv[], void *userdata);