diff --git a/HowtoKVM.md b/HowtoKVM.md
index f77beafd..f48aefa8 100644
--- a/HowtoKVM.md
+++ b/HowtoKVM.md
@@ -531,8 +531,7 @@ auto br0
 iface br0 inet static
   bridge_ports eth0
   up echo 0 > /sys/class/net/br0/bridge/multicast_snooping
-  address <address>
-  netmask <netmask>
+  address <address>/<netmask>
   gateway <gateway>
 
 # screen -S network -dm bash -c "sleep 300; cp /var/backups/interfaces /etc/network/; systemctl networking stop; systemctl networking start"