diff --git a/machines/views.py b/machines/views.py
index 45723df4..d875ef15 100644
--- a/machines/views.py
+++ b/machines/views.py
@@ -90,7 +90,7 @@ def new_machine(request, userid):
     machine = NewMachineForm(request.POST or None)
     interface = AddInterfaceForm(request.POST or None, infra=request.user.has_perms(('infra',))) 
     nb_machine = Interface.objects.filter(machine__user=userid).count()
-    domain = DomainForm(request.POST or None, name_user=user.pseudo.replace('_','.'), nb_machine=nb_machine)
+    domain = DomainForm(request.POST or None, name_user=user.pseudo.replace('_','-'), nb_machine=nb_machine)
     if machine.is_valid() and interface.is_valid():
         new_machine = machine.save(commit=False)
         new_machine.user = user