diff --git a/code/constitutive.f90 b/code/constitutive.f90
index 34366e0be..c650dcbce 100644
--- a/code/constitutive.f90
+++ b/code/constitutive.f90
@@ -1,21 +1,3 @@
-! Copyright 2011-13 Max-Planck-Institut für Eisenforschung GmbH
-!
-! This file is part of DAMASK,
-! the Düsseldorf Advanced MAterial Simulation Kit.
-!
-! DAMASK 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.
-!
-! DAMASK 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 DAMASK. If not, see <http://www.gnu.org/licenses/>.
-!
 !--------------------------------------------------------------------------------------------------
 ! $Id$
 !--------------------------------------------------------------------------------------------------
diff --git a/code/constitutive_dislotwin.f90 b/code/constitutive_dislotwin.f90
index f817e7afb..36e6fb5c8 100644
--- a/code/constitutive_dislotwin.f90
+++ b/code/constitutive_dislotwin.f90
@@ -1,21 +1,3 @@
-! Copyright 2011-13 Max-Planck-Institut für Eisenforschung GmbH
-!
-! This file is part of DAMASK,
-! the Düsseldorf Advanced MAterial Simulation Kit.
-!
-! DAMASK 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.
-!
-! DAMASK 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 DAMASK. If not, see <http://www.gnu.org/licenses/>.
-!
 !--------------------------------------------------------------------------------------------------
 ! $Id$
 !--------------------------------------------------------------------------------------------------