diff --git a/ada/clock_gettime/hw-time-timer.adb b/ada/clock_gettime/hw-time-timer.adb
index 914b201..5f12db7 100644
--- a/ada/clock_gettime/hw-time-timer.adb
+++ b/ada/clock_gettime/hw-time-timer.adb
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/ada/dynamic_mmio/hw-mmio_range.adb b/ada/dynamic_mmio/hw-mmio_range.adb
index 78cc048..6a1f1f9 100644
--- a/ada/dynamic_mmio/hw-mmio_range.adb
+++ b/ada/dynamic_mmio/hw-mmio_range.adb
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/ada/static_mmio/hw-mmio_range.adb b/ada/static_mmio/hw-mmio_range.adb
index fb72152..7e111a7 100644
--- a/ada/static_mmio/hw-mmio_range.adb
+++ b/ada/static_mmio/hw-mmio_range.adb
@@ -3,7 +3,8 @@
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
 --
 -- This program is distributed in the hope that it will be useful,
 -- but WITHOUT ANY WARRANTY; without even the implied warranty of