diff --git a/run/network.sh b/run/network.sh
index 153045e..b3e5a6f 100644
--- a/run/network.sh
+++ b/run/network.sh
@@ -3,10 +3,12 @@ set -Eeuo pipefail
 
 # Docker environment variables
 
+: ${GUEST_MAC:='02:11:32:AA:BB:CC'}
+
 : ${VM_NET_TAP:='dsm'}
 : ${VM_NET_DEV:='eth0'}
 : ${VM_NET_HOST:='VirtualDSM'}
-: ${VM_NET_MAC:='02:11:32:AA:BB:CC'}
+: ${VM_NET_MAC:='$GUEST_MAC'}
 
 : ${DHCP:='N'}
 : ${DNS_SERVERS:=''}
@@ -208,6 +210,7 @@ update-alternatives --set iptables /usr/sbin/iptables-legacy > /dev/null
 update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy > /dev/null
 
 VM_NET_MAC="${VM_NET_MAC//-/:}"
+
 GATEWAY=$(ip r | grep default | awk '{print $3}')
 
 if [[ "${DEBUG}" == [Yy1]* ]]; then