diff --git a/COPYING b/COPYING
index 5f97efaa..2b034848 100644
--- a/COPYING
+++ b/COPYING
@@ -40,7 +40,7 @@ include their complete licence notices in COPYING:
 * doc/tools/asciidoc/: GPLv2 or later.
 
 * doc/tools/help2xml, po/perl/msgaccel-check,
-  po/perl/msgaccel-prepare: ISC licence.
+  po/perl/msgaccel-prepare, Unicode/gen-case: ISC licence.
 
 * po/perl/Locale/PO.pm: "same terms as Perl itself", i.e. GPLv1 or
   later or Artistic License.
diff --git a/Unicode/gen-case b/Unicode/gen-case
index 9ca69ddc..b9800c87 100755
--- a/Unicode/gen-case
+++ b/Unicode/gen-case
@@ -111,7 +111,7 @@ Kalle Olavi Niemitalo <kon@iki.fi>
 
 Copyright (c) 2006 Kalle Olavi Niemitalo.
 
-Permission to use, copy, modify, and distribute this software for any
+Permission to use, copy, modify, and/or distribute this software for any
 purpose with or without fee is hereby granted, provided that the above
 copyright notice and this permission notice appear in all copies.