diff --git a/src/escape/escape.c b/src/escape/escape.c
index eaf0a9a7af..cd99ca62f4 100644
--- a/src/escape/escape.c
+++ b/src/escape/escape.c
@@ -1,7 +1,4 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
-/***
-  Copyright © 2014 Michael Biebl
-***/
 
 #include <getopt.h>
 #include <stdio.h>
diff --git a/src/network/netdev/vrf.c b/src/network/netdev/vrf.c
index f341061344..b18090f7a1 100644
--- a/src/network/netdev/vrf.c
+++ b/src/network/netdev/vrf.c
@@ -1,7 +1,4 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
-/***
-  Copyright © 2016 Andreas Rammhold <andreas@rammhold.de>
-***/
 
 #include <net/if.h>
 
diff --git a/src/network/netdev/vrf.h b/src/network/netdev/vrf.h
index d1ac6f6976..05b3937856 100644
--- a/src/network/netdev/vrf.h
+++ b/src/network/netdev/vrf.h
@@ -1,10 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
 #pragma once
 
-/***
-  Copyright © 2016 Andreas Rammhold <andreas@rammhold.de>
-***/
-
 typedef struct Vrf Vrf;
 
 #include "netdev/netdev.h"
diff --git a/tools/check-includes.pl b/tools/check-includes.pl
index 6aae7c1534..c8bfcba8c0 100755
--- a/tools/check-includes.pl
+++ b/tools/check-includes.pl
@@ -1,7 +1,7 @@
+# SPDX-License-Identifier: CC0-1.0
 #!/usr/bin/env perl
 #
 # checkincludes: Find files included more than once in (other) files.
-# Copyright abandoned, 2000, Niels Kristian Bech Jensen <nkbj@image.dk>.
 
 foreach $file (@ARGV) {
 	open(FILE, $file) or die "Cannot open $file: $!.\n";