diff --git a/gestion/hptools2/switch.py b/gestion/hptools2/switch.py
index 3d97f2f5..b5aea8c6 100644
--- a/gestion/hptools2/switch.py
+++ b/gestion/hptools2/switch.py
@@ -65,7 +65,7 @@ class HPSwitch(object):
             try:
                 netaddr.IPAddress(switch)
             except netaddr.AddrFormatError:
-                raise SwitchNotFound
+                raise SwitchNotFound("Switch %r non trouvé." % (switch,))
 
         switch_object = HPSwitchFactory.get_switch(__switch)
         if switch_object is None: