diff --git a/xos/synchronizers/openstack/steps/sync_instances.py b/xos/synchronizers/openstack/steps/sync_instances.py
index 884bcf5..3a1bc52 100644
--- a/xos/synchronizers/openstack/steps/sync_instances.py
+++ b/xos/synchronizers/openstack/steps/sync_instances.py
@@ -97,7 +97,7 @@
             nics.append({"kind": "port", "value": port.port_id, "network": port.network})
 
         # we want to exclude from 'nics' any network that already has a Port
-        existing_port_networks = [port.network for network in Port.objects.filter(instance=instance)]
+        existing_port_networks = [port.network for port in Port.objects.filter(instance=instance)]
 
         networks = [ns.network for ns in NetworkSlice.objects.filter(slice=instance.slice) if ns.network not in existing_port_networks]
         controller_networks = ControllerNetwork.objects.filter(network__in=networks,