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--- a/src/ohvolume.cxx
+++ b/src/ohvolume.cxx
@@ -1,15 +1,15 @@
 /* Copyright (C) 2014 J.F.Dockes
  *	 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 2 of the License, or
+ *	 it under the terms of the GNU Lesser General Public License as published by
+ *	 the Free Software Foundation; either version 2.1 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
  *	 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *	 GNU General Public License for more details.
+ *	 GNU Lesser General Public License for more details.
  *
- *	 You should have received a copy of the GNU General Public License
+ *	 You should have received a copy of the GNU Lesser General Public License
  *	 along with this program; if not, write to the
  *	 Free Software Foundation, Inc.,
  *	 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.