diff --git a/gestion/gen_confs/bind.py b/gestion/gen_confs/bind.py
index c25b8ee3..c8c80da5 100755
--- a/gestion/gen_confs/bind.py
+++ b/gestion/gen_confs/bind.py
@@ -73,6 +73,9 @@ class TLSA(ResourceRecord):
         if not r_format in ['pem', 'der']:
             raise ValueError("format should be pem or der")
 
+        if selector != 0:
+            raise NotImplementedError("selector different form 0 not implemented")
+
         if cert is None and proto == 'tcp' and name[-1] == '.':
             try:
                 cert = ssl.get_server_certificate((name[:-1], port), ca_certs='/etc/ssl/certs/ca-certificates.crt')
@@ -90,6 +93,7 @@ class TLSA(ResourceRecord):
             raise ValueError("Impossible de convertir le certificat au format DER %s %s %s\n%s" % (name, port, proto, cert))
 
         certhex = TLSA.hashCert(reftype, str(dercert))
+        self.certhex = certhex
         if compat:
             super(TLSA, self).__init__(
                 'TYPE52',