diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
index c7331f29..030b3bad 100644
--- a/PVE/API2/Qemu.pm
+++ b/PVE/API2/Qemu.pm
@@ -562,6 +562,7 @@ my $cloudinitoptions = {
     cipassword => 1,
     citype => 1,
     ciuser => 1,
+    ciupgrade => 1,
     nameserver => 1,
     searchdomain => 1,
     sshkeys => 1,
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index aff33728..4c6ff8a7 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -760,6 +760,7 @@ my $cicustom_fmt = {
 };
 PVE::JSONSchema::register_format('pve-qm-cicustom', $cicustom_fmt);
 
+# any new option might need to be added to $cloudinitoptions in PVE::API2::Qemu
 my $confdesc_cloudinit = {
     citype => {
 	optional => 1,