diff --git a/partner_firstname/models/res_partner.py b/partner_firstname/models/res_partner.py
index 7ad372d01..02b8de527 100644
--- a/partner_firstname/models/res_partner.py
+++ b/partner_firstname/models/res_partner.py
@@ -137,7 +137,7 @@ class ResPartner(models.Model):
         """
         try:
             name = " ".join(name.split()) if name else name
-        except UnicodeDecodeError:
+        except (UnicodeDecodeError, TypeError):
             # with users coming from LDAP, name can be a str encoded as utf-8
             # this happens with ActiveDirectory for instance, and in that case
             # we get a UnicodeDecodeError during the automatic ASCII -> Unicode