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";