diff --git a/wrap/io_trimesh/additionalinfo.h b/wrap/io_trimesh/additionalinfo.h
index c02f22f5..e84be381 100644
--- a/wrap/io_trimesh/additionalinfo.h
+++ b/wrap/io_trimesh/additionalinfo.h
@@ -1,3 +1,26 @@
+/****************************************************************************
+* MeshLab                                                           o o     *
+* An extendible mesh processor                                    o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2005, 2009                                          \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* 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 (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+
 #ifndef __VCGLIB_ADDITIONAL_INFO
 #define __VCGLIB_ADDITIONAL_INFO
 
diff --git a/wrap/io_trimesh/export_idtf.h b/wrap/io_trimesh/export_idtf.h
index f8d729aa..04a64c82 100644
--- a/wrap/io_trimesh/export_idtf.h
+++ b/wrap/io_trimesh/export_idtf.h
@@ -1,3 +1,26 @@
+/****************************************************************************
+* MeshLab                                                           o o     *
+* An extendible mesh processor                                    o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2005, 2009                                          \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* 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 (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+
 #ifndef __VCGLIB_EXPORTERIDTF
 #define __VCGLIB_EXPORTERIDTF
 
diff --git a/wrap/io_trimesh/export_u3d.h b/wrap/io_trimesh/export_u3d.h
index dfcc7cc7..031085bc 100644
--- a/wrap/io_trimesh/export_u3d.h
+++ b/wrap/io_trimesh/export_u3d.h
@@ -1,3 +1,26 @@
+/****************************************************************************
+* MeshLab                                                           o o     *
+* An extendible mesh processor                                    o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2005, 2009                                          \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* 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 (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+
 #ifndef __VCGLIB_EXPORTERU3D
 #define __VCGLIB_EXPORTERU3D