diff --git a/munin/iptables_ b/munin/iptables_
index d9c59b7c..45f7b5b7 100755
--- a/munin/iptables_
+++ b/munin/iptables_
@@ -51,7 +51,8 @@ else :
             data = commands.getoutput("%s %s | uniq | awk '{print  $4}' | grep 231 | awk -F '.' '{print $1$2$3}' | sort | uniq -c | grep 231" % (IPTABLES, chain)).split('\n')
             total = 0
             for line in data :
-                value, subnet = line.split()
+                try: value, subnet = line.split()
+                except ValueError: continue
                 total += int(value)
                 if subnet[:8] == "10231136":
                     print "%sadm.value %s" % (nom, value)