diff --git a/tryton/common/common.py b/tryton/common/common.py
index c1f3d5a3da..3b0cc6dd24 100644
--- a/tryton/common/common.py
+++ b/tryton/common/common.py
@@ -10,6 +10,7 @@ import os
 import subprocess
 import re
 import logging
+from functools import partial
 from tryton.config import CONFIG
 from tryton.config import TRYTON_ICON, PIXMAPS_DIR
 import time
@@ -897,9 +898,10 @@ def send_bugtracker(title, msg):
             protocol = 'http'
             if ssl or hasattr(socket, 'ssl'):
                 protocol = 'https'
+            quote = partial(urllib.quote, safe="!$&'()*+,;=:")
             server = xmlrpclib.Server(
                 ('%s://%s:%s@' + CONFIG['roundup.xmlrpc'])
-                % (protocol, user, password), allow_none=True)
+                % (protocol, quote(user), quote(password)), allow_none=True)
             if hashlib:
                 msg_md5 = hashlib.md5(msg + '\n' + title).hexdigest()
             else: