static int bus_manager_append_virt(DBusMessageIter *i, const char *property, void *data) {
Manager *m = data;
- const char *id = "";
+ const char *id = NULL;
assert(i);
assert(property);
detect_virtualization(&id);
+ if (!id)
+ id = "";
if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &id))
return -ENOMEM;