diff --git a/Cfg/etc/default/arpwatch/arpwatch b/Cfg/etc/default/arpwatch/arpwatch
index c586a8b..e9f87dd 100644
--- a/Cfg/etc/default/arpwatch/arpwatch
+++ b/Cfg/etc/default/arpwatch/arpwatch
@@ -2,7 +2,9 @@
 # Global options for arpwatch(8).
 
 # Debian: don't report bogons, don't use PROMISC.
-ARGS="-N -p -s /usr/scripts/surveillance/arpwatch/report.py"
+# Crans: ignore multicast addresses (merci Apple)
+#    (cf https://bugzilla.redhat.com/show_bug.cgi?id=841067)
+ARGS="-N -p -z 224.0.0.0/240.0.0.0 -s /usr/scripts/surveillance/arpwatch/report.py"
 
 # Debian: run as `arpwatch' user.  Empty this to run as root.
 RUNAS="arpwatch"