diff --git a/gestion/ipt.py b/gestion/ipt.py
index 128cf470..eea46700 100644
--- a/gestion/ipt.py
+++ b/gestion/ipt.py
@@ -31,8 +31,9 @@ from ridtools import Rid, find_rid_plage
 import subprocess
 import netaddr
 
-blacklist_sanctions.extend(blacklist_sanctions_soft)
-blacklist_sanctions.extend(blacklist_bridage_upload)
+blacklist_sanctions_ipv6 = list(blacklist_sanctions)
+blacklist_sanctions_ipv6.extend(blacklist_sanctions_soft)
+blacklist_sanctions_ipv6.extend(blacklist_bridage_upload)
 
 Mangle_policy = """
 *mangle
@@ -756,7 +757,7 @@ def blacklist(ipt):
 
     for target in s['adherent'] + s['club']:
         sanctions = target.blacklist_actif()
-        if [x for x in sanctions if x in blacklist_sanctions]:
+        if [x for x in sanctions if x in blacklist_sanctions_ipv6]:
             blcklst.extend(target.machines())
 
     s = db.search('mblacklist=*&paiement=%s' % ann_scol)
@@ -765,7 +766,7 @@ def blacklist(ipt):
             
     for target in s['machine']:
         sanctions = target.blacklist_actif()
-        if [x for x in sanctions if x in blacklist_sanctions]:
+        if [x for x in sanctions if x in blacklist_sanctions_ipv6]:
             blcklst.append(target)
 
     if ipt.filter.blacklist_src.items: