diff --git a/gestioncof/autocomplete.py b/gestioncof/autocomplete.py
index a9abbad7..7a9c37d2 100644
--- a/gestioncof/autocomplete.py
+++ b/gestioncof/autocomplete.py
@@ -14,6 +14,10 @@ from gestioncof.decorators import buro_required
 
 class Clipper(object):
     def __init__(self, clipper, fullname):
+        if fullname is None:
+            fullname = ""
+        assert isinstance(clipper, str)
+        assert isinstance(fullname, str)
         self.clipper = clipper
         self.fullname = fullname
 
@@ -62,17 +66,19 @@ def autocomplete(request):
         ))
         if ldap_query != "(&)":
             # If none of the bits were legal, we do not perform the query
+            entries = None
             with Connection(settings.LDAP_SERVER_URL) as conn:
                 conn.search(
                     'dc=spi,dc=ens,dc=fr', ldap_query,
                     attributes=['uid', 'cn']
                 )
-                queries['clippers'] = conn.entries
+                entries = conn.entries
             # Clearing redundancies
             queries['clippers'] = [
-                Clipper(clipper.uid, clipper.cn)
-                for clipper in queries['clippers']
-                if str(clipper.uid) not in usernames
+                Clipper(entry.uid.value, entry.cn.value)
+                for entry in entries
+                if entry.uid.value is not None
+                and entry.uid.value not in usernames
             ]
 
     # Resulting data
diff --git a/kfet/autocomplete.py b/kfet/autocomplete.py
index bee99517..0ab2c8aa 100644
--- a/kfet/autocomplete.py
+++ b/kfet/autocomplete.py
@@ -13,6 +13,10 @@ from kfet.models import Account
 
 class Clipper(object):
     def __init__(self, clipper, fullname):
+        if fullname is None:
+            fullname = ""
+        assert isinstance(clipper, str)
+        assert isinstance(fullname, str)
         self.clipper = clipper
         self.fullname = fullname
 
@@ -80,17 +84,19 @@ def account_create(request):
         ))
         if ldap_query != "(&)":
             # If none of the bits were legal, we do not perform the query
+            entries = None
             with Connection(settings.LDAP_SERVER_URL) as conn:
                 conn.search(
                     'dc=spi,dc=ens,dc=fr', ldap_query,
                     attributes=['uid', 'cn']
                 )
-                queries['clippers'] = conn.entries
+                entries = conn.entries
             # Clearing redundancies
             queries['clippers'] = [
-                Clipper(clipper.uid, clipper.cn)
-                for clipper in queries['clippers']
-                if str(clipper.uid) not in usernames
+                Clipper(entry.uid.value, entry.cn.value)
+                for entry in entries
+                if entry.uid.value is not None
+                and entry.uid.value not in usernames
             ]
 
     # Resulting data