diff --git a/scripts/relicense.py b/scripts/relicense.py
new file mode 100644
index 000000000..8a5265f1f
--- /dev/null
+++ b/scripts/relicense.py
@@ -0,0 +1,69 @@
+# This file is part of Eigen, a lightweight C++ template library
+# for linear algebra.
+#
+# Copyright (C) 2012 Keir Mierle <mierle@gmail.com>
+#
+# This Source Code Form is subject to the terms of the Mozilla
+# Public License v. 2.0. If a copy of the MPL was not distributed
+# with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# Author: mierle@gmail.com (Keir Mierle)
+#
+# Make the long-awaited conversion to MPL.
+
+lgpl3_header = '''
+// Eigen is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 3 of the License, or (at your option) any later version.
+//
+// Alternatively, 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.
+//
+// Eigen 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 Lesser General Public License or the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License and a copy of the GNU General Public License along with
+// Eigen. If not, see <http://www.gnu.org/licenses/>.
+'''
+
+mpl2_header = """
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+"""
+
+import os
+import sys
+
+exclusions = set(['relicense.py'])
+
+def update(text):
+  if text.find(lgpl3_header) == -1:
+    return text, False
+  return text.replace(lgpl3_header, mpl2_header), True
+
+rootdir = sys.argv[1]
+for root, sub_folders, files in os.walk(rootdir):
+    for basename in files:
+        if basename in exclusions:
+          print 'SKIPPED', filename
+          continue
+        filename = os.path.join(root, basename)
+        fo = file(filename)
+        text = fo.read()
+        fo.close()
+
+        text, updated = update(text)
+        if updated:
+          fo = file(filename, "w")
+          fo.write(text)
+          fo.close()
+          print 'UPDATED', filename
+        else:
+          print '       ', filename