diff --git a/mxgrub/mxgrub b/mxgrub/mxgrub
index d784dd2..0120294 100755
--- a/mxgrub/mxgrub
+++ b/mxgrub/mxgrub
@@ -283,13 +283,15 @@ sub cmd_list {
 
 	$mbr_type eq 'GRUB' or warn "WARNING: $root_disk MBR type is $mbr_type\n";
 
-	is_VX50() and warn "WARNING: This is a VX50, I refuse to install grub here\n";
+	is_VX50() && $mbr_type ne 'GRUB' and warn "WARNING: This is a VX50, I refuse to install grub here\n";
 }
 
 sub cmd_install {
 	my ($label)=@_;		#
+	my ($root_device,$root_disk)=root_dev();
+	my $mbr_type=check_mbr($root_disk);
 
-	is_VX50() and die "This is a VX50, I refuse to install grub here\n";
+	is_VX50() && $mbr_type ne 'GRUB' and die "This is a VX50, I refuse to install grub here\n";
 
 	if ($label eq 'default') {
 		scan_mariux(0);
@@ -301,8 +303,6 @@ sub cmd_install {
 
 	update_grub_cfg();
 
-	my ($root_device,$root_disk)=root_dev();
-	my $mbr_type=check_mbr($root_disk);
 	if ($mbr_type ne 'GRUB') {
 		sys 'grub-install',$root_disk and exit 1;
 	}