diff --git a/tryton/gui/window/attachment.py b/tryton/gui/window/attachment.py
index f38ed034eb..da0e1464f0 100644
--- a/tryton/gui/window/attachment.py
+++ b/tryton/gui/window/attachment.py
@@ -4,6 +4,7 @@
 import os
 import urllib
 import urlparse
+import sys
 
 from tryton.gui.window.view_form.screen import Screen
 from tryton.gui.window.win_form import WinForm
@@ -47,5 +48,6 @@ class Attachment(WinForm):
         new_record = self.screen.new()
         file_name = os.path.basename(urlparse.urlparse(uri).path)
         name_field.set_client(new_record, file_name)
+        uri = uri.decode('utf-8').encode(sys.getfilesystemencoding())
         data_field.set_client(new_record, urllib.urlopen(uri).read())
         self.screen.display()