diff --git a/pmg-log-tracker.c b/pmg-log-tracker.c
index e411ab7..872ba06 100644
--- a/pmg-log-tracker.c
+++ b/pmg-log-tracker.c
@@ -1,10 +1,25 @@
 /*
 
- (C) 2007-2017 Proxmox Server Solutions GmbH, All Rights Reserved
+  (C) 2007-2017 Proxmox Server Solutions GmbH, All Rights Reserved
 
- Proxmox Mail Tracker
+  Proxmox Mail Tracker
 
- See http://www.proxmox.com for more information
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU Affero General Public License as published by
+  the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+  Author: Dietmar Maurer <dietmar@proxmox.com>
+
+  See http://www.proxmox.com for more information
 
 */