diff --git a/src/PVE/INotify.pm b/src/PVE/INotify.pm
index 3300850..6892b4c 100644
--- a/src/PVE/INotify.pm
+++ b/src/PVE/INotify.pm
@@ -1385,7 +1385,7 @@ sub __write_etc_network_interfaces {
 	    my $n = $ifaces->{$p};
 
 	    die "vlan '$iface' - unable to find parent '$p'\n"
-		if $n->{exists} eq 0;
+		if !$n;
 
 	    if ($n->{type} eq 'bridge' && !$n->{bridge_vlan_aware}) {
 		die "vlan '$iface' - bridge vlan aware is not enabled on parent '$p'\n";