diff --git a/Eigen/OrderingMethods b/Eigen/OrderingMethods
index 7c0f1ff..d8ea361 100644
--- a/Eigen/OrderingMethods
+++ b/Eigen/OrderingMethods
@@ -1,3 +1,10 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// 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/.
+
 #ifndef EIGEN_ORDERINGMETHODS_MODULE_H
 #define EIGEN_ORDERINGMETHODS_MODULE_H