diff --git a/objets.py b/objets.py
index c518676..4099ec3 100644
--- a/objets.py
+++ b/objets.py
@@ -345,8 +345,8 @@ class CransLdapObject(object):
                 if attr.historique == "full":
                     comm = u"%s (%s -> %s)" % (attr.ldap_name, old_values[0], new_values[0])
                 elif attr.historique == "partial":
-                    old = partial_name(str(old_values[0]))
-                    new = partial_name(str(new_values[0]))
+                    old = partial_name(unicode(old_values[0]))
+                    new = partial_name(unicode(new_values[0]))
                     comm = u"%s (%s -> %s)" % (attr.ldap_name, old, new)
                 elif attr.historique == "info":
                     comm = u"%s" % attr.ldap_name
@@ -355,7 +355,7 @@ class CransLdapObject(object):
                 if attr.historique == "info":
                     comm = u"+%s" % attr.ldap_name
                 elif attr.historique in ["full", "partial"]:
-                    new = str(new_values[0])
+                    new = unicode(new_values[0])
                     if attr.historique == "partial":
                         new = partial_name(new)
                     comm = u"%s+%s" % (attr.ldap_name, new)
@@ -364,7 +364,7 @@ class CransLdapObject(object):
                 if attr.historique == "info":
                     comm = u"-%s" % attr.ldap_name
                 elif attr.historique in ["full", "partial"]:
-                    old = str(old_values[0])
+                    old = unicode(old_values[0])
                     if attr.historique == "partial":
                         old = partial_name(old)
                     comm = u"%s-%s" % (attr.ldap_name, old)