diff --git a/src/tools/jid.py b/src/tools/jid.py
index a9384c12..0f156297 100644
--- a/src/tools/jid.py
+++ b/src/tools/jid.py
@@ -22,7 +22,7 @@ class JID(unicode):
     """This class help manage JID (Node@Domaine/Resource)"""
 
     def __new__(cls, jid):
-        self = unicode.__new__(cls, jid)
+        self = unicode.__new__(cls, jid.lower())
         self.__parse()
         return self