diff --git a/attributs.py b/attributs.py
index 17c646c..3d2fc3f 100644
--- a/attributs.py
+++ b/attributs.py
@@ -297,7 +297,7 @@ class mid(Attr):
     legend = "Identifiant de machine"
 
     def parse_value(self, mid, ldif):
-        self.value = Mid(mid = mid)
+        self.value = Mid(mid = int(mid))
 
     def __unicode__(self):
         return unicode(int(self.value))