diff --git a/m4/sigrok.m4 b/m4/sigrok.m4
index e9052585..2d0d70fc 100644
--- a/m4/sigrok.m4
+++ b/m4/sigrok.m4
@@ -1,22 +1,24 @@
-## Copyright (c) 2009  Openismus GmbH
-## Copyright (c) 2015  Daniel Elstner <daniel.kitta@gmail.com>
 ##
 ## This file is part of the sigrok project.
 ##
-## sigrok is free software: you can redistribute it and/or modify it
-## under the terms of the GNU General Public License as published by
+## Copyright (C) 2009 Openismus GmbH
+## Copyright (C) 2015 Daniel Elstner <daniel.kitta@gmail.com>
+##
+## 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, either version 3 of the License, or
 ## (at your option) any later version.
 ##
-## sigrok is distributed in the hope that it will be useful,
+## This program is distributed in the hope that it will be useful,
 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ## GNU General Public License for more details.
 ##
 ## You should have received a copy of the GNU General Public License
-## along with sigrok. If not, see <http://www.gnu.org/licenses/>.
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
 
-#serial 20150824
+#serial 20150825
 
 ## SR_APPEND(var-name, [list-sep,] element)
 ##