diff --git a/doc/contributor_copyright.txt b/doc/contributor_copyright.txt
new file mode 100644
index 00000000..c916fe49
--- /dev/null
+++ b/doc/contributor_copyright.txt
@@ -0,0 +1,6 @@
+WE the undersigned contributors, grant perpetual license for the 
+original authors of OpenSCAD, Marius Kintel and Clifford Wolf, to 
+change the license under which the code we have contributed to OpenSCAD is
+released, in future versions of OpenSCAD. 
+
+Don Bright <hugh.m.bright@gmail.com> 2012
diff --git a/scripts/linux-build-dependencies.sh b/scripts/linux-build-dependencies.sh
index 5339de15..aee423cb 100755
--- a/scripts/linux-build-dependencies.sh
+++ b/scripts/linux-build-dependencies.sh
@@ -1,4 +1,9 @@
 #!/bin/sh -e
+
+# test_pretty_print copyright 2012 don bright. released under the GPL 2, or
+# later, as described in the file named 'COPYING' in OpenSCAD's project root.
+# permission to change this license is given to Marius Kintel & Clifford Wolf
+
 #
 # This script builds all library dependencies of OpenSCAD for Linux
 #
diff --git a/src/version_check.h b/src/version_check.h
index 8e131be6..9b98c92f 100644
--- a/src/version_check.h
+++ b/src/version_check.h
@@ -1,5 +1,6 @@
 // version_check.h copyright 2012 don bright. released under the GPL 2, or
 // later, as described in the file named 'COPYING' in OpenSCAD's project root.
+// permission to change this license is given to Marius Kintel & Clifford Wolf
 
 /* This file will check versions of libraries at compile time. If they
 are too old, the user will be warned. If the user wishes to force
diff --git a/tests/test_pretty_print.py b/tests/test_pretty_print.py
index 5e250523..8c57f1c2 100755
--- a/tests/test_pretty_print.py
+++ b/tests/test_pretty_print.py
@@ -1,20 +1,8 @@
 #!/usr/bin/python
 
-#  Copyright (C) 2011 Don Bright <hugh.m.bright@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 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
-#  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 this program; if not, write to the Free Software
-#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+# test_pretty_print copyright 2012 don bright. released under the GPL 2, or
+# later, as described in the file named 'COPYING' in OpenSCAD's project root.
+# permission to change this license is given to Marius Kintel & Clifford Wolf
 
 #
 # This program 'pretty prints' the ctest output, namely