diff --git a/gestion/gest_crans.py b/gestion/gest_crans.py
index 4eb96b63..d0382d86 100755
--- a/gestion/gest_crans.py
+++ b/gestion/gest_crans.py
@@ -894,20 +894,19 @@ def set_machine(machine) :
     
     try : machine.mac(result[1])
     except ValueError, c : 
-        if len(c.args)>1:
-            if c.args[1] == 1 and isadm :
-                # Mac en double
-                arg = u'--title "Adresse MAC" '
-                arg+= u'--yesno "L\'adresse MAC existe déja, continuer ? \n" 0 0'
-                no, res = dialog(arg)
-                if no :
-                    return set_machine(machine)
-                else :
-                    try : machine.mac(result[1],1)
-                    except ValueError, c : err += c.args[0] + '\n'
-                    except EnvironmentError, c : err += c.args[0] + '\n'
-            else:
-                err += c.args[0] + '\n'
+        if len(c.args)>1 and c.args[1] == 1 and isadm:
+            # Mac en double
+            arg = u'--title "Adresse MAC" '
+            arg+= u'--yesno "L\'adresse MAC existe déja, continuer ? \n" 0 0'
+            no, res = dialog(arg)
+            if no :
+                return set_machine(machine)
+            else :
+                try : machine.mac(result[1],1)
+                except ValueError, c : err += c.args[0] + '\n'
+                except EnvironmentError, c : err += c.args[0] + '\n'
+        else:
+            err += c.args[0] + '\n'
                 
     except EnvironmentError, c : err += c.args[0] + '\n'