diff --git a/src/PVE/API2/Storage/Status.pm b/src/PVE/API2/Storage/Status.pm
index 3ce11fc..f7e324f 100644
--- a/src/PVE/API2/Storage/Status.pm
+++ b/src/PVE/API2/Storage/Status.pm
@@ -746,6 +746,7 @@ __PACKAGE__->register_method({
 			    description => 'What this warning is about.',
 			    enum => [
 				'cdrom-image-ignored',
+				'efi-state-lost',
 				'guest-is-running',
 				'nvme-unsupported',
 				'ovmf-with-lsi-unsupported',
diff --git a/src/PVE/Storage/ESXiPlugin.pm b/src/PVE/Storage/ESXiPlugin.pm
index 3f47577..e448760 100644
--- a/src/PVE/Storage/ESXiPlugin.pm
+++ b/src/PVE/Storage/ESXiPlugin.pm
@@ -955,6 +955,7 @@ sub get_create_args {
     if ($firmware eq 'efi') {
 	$create_args->{bios} = 'ovmf';
 	$create_disks->{efidisk0} = 1;
+	$warn->('efi-state-lost', key => "bios", value => "ovmf");
     } else {
 	$create_args->{bios} = 'seabios';
     }