diff --git a/script/network_config.sh b/script/network_config.sh
index 6b59df8..5ea0e68 100755
--- a/script/network_config.sh
+++ b/script/network_config.sh
@@ -37,7 +37,7 @@ iface ${NETWORK_INTERFACE} inet6 static
 auto vmbr0
 iface vmbr0 inet static
         address  ${MAINSERVERIP}
-        netmask  32
+        netmask  ${NETMASK}
         gateway  ${GATEWAYADRESS}
         broadcast  ${BROADCASTIP}
         bridge-ports ${NETWORK_INTERFACE}