diff --git a/tools/tools/locale/tools/cldr2def.pl b/tools/tools/locale/tools/cldr2def.pl
index 3be828c1e0ab..3fb1b5396cd1 100755
--- a/tools/tools/locale/tools/cldr2def.pl
+++ b/tools/tools/locale/tools/cldr2def.pl
@@ -794,6 +794,7 @@ sub make_makefile {
 	}
 	open(FOUT, ">$TYPE.draft/Makefile");
 	print FOUT <<EOF;
+# \$FreeBSD\$
 # Warning: Do not edit. This file is automatically generated from the
 # tools in /usr/src/tools/tools/locale.