diff --git a/tryton/gui/main.py b/tryton/gui/main.py
index aa8fa8a77e..2d4dd9d6c8 100644
--- a/tryton/gui/main.py
+++ b/tryton/gui/main.py
@@ -10,7 +10,7 @@ import tryton.common as common
 from tryton.version import VERSION
 from tryton.action import Action
 from tryton.gui.window import Window
-from tryton.gui.window import Preference
+from tryton.gui.window.preference import Preference
 from tryton.gui.window import FilesActions
 import re
 import base64
diff --git a/tryton/gui/window/tree.py b/tryton/gui/window/tree.py
index 0ced552d09..cb93860941 100644
--- a/tryton/gui/window/tree.py
+++ b/tryton/gui/window/tree.py
@@ -3,7 +3,7 @@ import gtk
 from gtk import glade
 import gettext
 import tryton.common as common
-from view_tree import ViewTree, ViewTreeSC
+from tryton.gui.window.view_tree import ViewTree, ViewTreeSC
 import tryton.rpc as rpc
 from tryton.config import CONFIG
 from tryton.gui.window.win_export import WinExport
diff --git a/tryton/tryton.py b/tryton/tryton.py
index 692a75eafa..3447d5ff32 100644
--- a/tryton/tryton.py
+++ b/tryton/tryton.py
@@ -40,7 +40,7 @@ import version
 import config
 from config import CONFIG, CURRENT_DIR, PREFIX, PIXMAPS_DIR, TRYTON_ICON
 import translate
-from gui import Main
+import gui
 
 
 class TrytonClient(object):
@@ -87,7 +87,7 @@ class TrytonClient(object):
             factory.add('gtk-' + name[7:], icon_set)
 
     def run(self):
-        main = Main()
+        main = gui.Main()
         if CONFIG['tip.autostart']:
             main.sig_tips()
         main.sig_login()