diff --git a/qubes/vm/appvm.py b/qubes/vm/appvm.py
index 4e5c4178..6924d3b7 100644
--- a/qubes/vm/appvm.py
+++ b/qubes/vm/appvm.py
@@ -1,5 +1,28 @@
 #!/usr/bin/python2 -O
 # vim: fileencoding=utf-8
+#
+# The Qubes OS Project, http://www.qubes-os.org
+#
+# Copyright (C) 2014-2016  Wojtek Porczyk <woju@invisiblethingslab.com>
+# Copyright (C) 2016       Marek Marczykowski <marmarek@invisiblethingslab.com>)
+# Copyright (C) 2016       Bahtiar `kalkin-` Gadimov <bahtiar@gadimov.de>
+#
+# 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 for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+
+''' This module contains the AppVM implementation '''
 
 import qubes.events
 import qubes.vm.qubesvm
@@ -45,7 +68,6 @@ class AppVM(qubes.vm.qubesvm.QubesVM):
 
     @qubes.events.handler('domain-load')
     def on_domain_loaded(self, event):
-        # pylint: disable=unused-argument
-        # Some additional checks for template based VM
+        ''' When domain is loaded assert that this vm has a template.
+        '''  # pylint: disable=unused-argument
         assert self.template
-        # self.template.appvms.add(self) # XXX