diff --git a/scripts-zfs/build-template b/scripts-zfs/build-template
index d7957a2..0063a90 100755
--- a/scripts-zfs/build-template
+++ b/scripts-zfs/build-template
@@ -29,7 +29,7 @@ VM_MACHINE=${VM_MACHINE:-"q35"}
 VM_MEMORY=${VM_MEMORY:-1024}
 VM_NET_BRIDGE=${VM_NET_BRIDGE:-"vmbr0"}
 VM_NET_TYPE=${VM_NET_TYPE:-"virtio"}
-VM_NET_VLAN=${VM_NET_VLAN:-1}
+VM_NET_VLAN=${VM_NET_VLAN:-""}
 VM_OS=${VM_OS:-"l26"}
 VM_RESIZE=${VM_RESIZE:-"1G"}
 VM_SCSIHW=${VM_SCSIHW:-"virtio-scsi-pci"}
@@ -59,7 +59,7 @@ function help() {
     --name, -n      Specify the VM name (default: 'template')
     --net-bridge    Specify the VM network bridge (default: 'vmbr0')
     --net-type      Specify the VM network type (default: 'virtio')
-    --net-vlan      Specify the VM network vlan tag (default: '1')
+    --net-vlan      Specify the VM network vlan tag
     --os            Specify the VM OS (default: 'l26')
     --resize        Increase the VM boot disk size (default: '1G')
     --scsihw        Specify the VM storage controller (default: 'virtio-scsi-pci')
@@ -229,7 +229,7 @@ function main() {
     --bios "${VM_BIOS}" --machine "${VM_MACHINE}" \
     --scsihw "${VM_SCSIHW}" --agent enabled=1 \
     --cpu cputype=host --memory "${VM_MEMORY}" \
-    --net0 "${VM_NET_TYPE}",bridge="${VM_NET_BRIDGE}",tag="${VM_NET_VLAN}"
+    --net0 "${VM_NET_TYPE}",bridge="${VM_NET_BRIDGE}""${VM_NET_VLAN:+,tag=$VM_NET_VLAN}"
 
   # import the cloud image
   /usr/sbin/qm disk import "${VM_ID}" "${VM_IMAGE}" "${VM_STORAGE}"
diff --git a/scripts/build-template b/scripts/build-template
index 86d9025..49e0f10 100755
--- a/scripts/build-template
+++ b/scripts/build-template
@@ -29,7 +29,7 @@ VM_MACHINE=${VM_MACHINE:-"q35"}
 VM_MEMORY=${VM_MEMORY:-1024}
 VM_NET_BRIDGE=${VM_NET_BRIDGE:-"vmbr0"}
 VM_NET_TYPE=${VM_NET_TYPE:-"virtio"}
-VM_NET_VLAN=${VM_NET_VLAN:-1}
+VM_NET_VLAN=${VM_NET_VLAN:-""}
 VM_OS=${VM_OS:-"l26"}
 VM_RESIZE=${VM_RESIZE:-"1G"}
 VM_SCSIHW=${VM_SCSIHW:-"virtio-scsi-pci"}
@@ -59,7 +59,7 @@ function help() {
     --name, -n      Specify the VM name (default: 'template')
     --net-bridge    Specify the VM network bridge (default: 'vmbr0')
     --net-type      Specify the VM network type (default: 'virtio')
-    --net-vlan      Specify the VM network vlan tag (default: '1')
+    --net-vlan      Specify the VM network vlan tag
     --os            Specify the VM OS (default: 'l26')
     --resize        Increase the VM boot disk size (default: '1G')
     --scsihw        Specify the VM storage controller (default: 'virtio-scsi-pci')
@@ -229,7 +229,7 @@ function main() {
     --bios "${VM_BIOS}" --machine "${VM_MACHINE}" \
     --scsihw "${VM_SCSIHW}" --agent enabled=1 \
     --cpu cputype=host --memory "${VM_MEMORY}" \
-    --net0 "${VM_NET_TYPE}",bridge="${VM_NET_BRIDGE}",tag="${VM_NET_VLAN}"
+    --net0 "${VM_NET_TYPE}",bridge="${VM_NET_BRIDGE}""${VM_NET_VLAN:+,tag=$VM_NET_VLAN}"
 
   # import the cloud image
   /usr/sbin/qm disk import "${VM_ID}" "${VM_IMAGE}" "${VM_STORAGE}"