to use the D-Bus machine ID from <filename>/var/lib/dbus/machine-id</filename>, the
value of the kernel command line option <varname>container_uuid</varname>, the KVM DMI
<filename>product_uuid</filename> or the devicetree <filename>vm,uuid</filename>
- (on KVM systems), and finally a randomly generated UUID.</para>
+ (on KVM systems), the Xen hypervisor <filename>uuid</filename>, and finally a randomly
+ generated UUID.</para>
<para>After the machine ID is established,
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>