diff --git a/PVE/CLI/qm.pm b/PVE/CLI/qm.pm
index b3b9251c..b9b60511 100755
--- a/PVE/CLI/qm.pm
+++ b/PVE/CLI/qm.pm
@@ -110,7 +110,7 @@ sub print_recursive_hash {
 	foreach my $item (@$hash) {
 	    print_recursive_hash("\t$prefix", $item);
 	}
-    } elsif (!ref($hash) && defined($hash)) {
+    } elsif ((!ref($hash) && defined($hash)) || ref($hash) eq 'JSON::PP::Boolean') {
 	if (defined($key)) {
 	    print "$prefix$key: $hash\n";
 	} else {
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 9704042c..6966717b 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -2748,6 +2748,14 @@ sub vmstatus {
 
     $qmpclient->queue_execute(undef, 2);
 
+    foreach my $vmid (keys %$list) {
+	next if $opt_vmid && ($vmid ne $opt_vmid);
+	# we can't use the $qmpclient since it might have already aborted on
+	# 'query-balloon', but this might also fail for older versions...
+	my $qemu_support = eval { mon_cmd($vmid, "query-proxmox-support") };
+	$res->{$vmid}->{'proxmox-support'} = $qemu_support // {};
+    }
+
     foreach my $vmid (keys %$list) {
 	next if $opt_vmid && ($vmid ne $opt_vmid);
 	$res->{$vmid}->{qmpstatus} = $res->{$vmid}->{status} if !$res->{$vmid}->{qmpstatus};