diff --git a/objets.py b/objets.py
index 0088a0f..0053b06 100644
--- a/objets.py
+++ b/objets.py
@@ -1547,9 +1547,9 @@ class facture(CransLdapObject):
          return super(facture, self).__setitem__(attr, value)
 
     def total(self):
-        total=0
+        total = 0
         for article in self["article"]:
-            total+=int(article['nombre'])*float(article['pu'])
+            total += int(article['nombre'])*float(article['pu'])
         return total
 
     def crediter(self):