{
/* Make a new screen and add it to the current cinema */
dcp::CertificateChain chain (dcp::file_to_string(optarg));
- auto screen = make_shared<Screen>(screen_description, "", chain.leaf(), vector<TrustedDevice>());
+ auto screen = std::make_shared<Screen>(screen_description, "", chain.leaf(), boost::none, vector<TrustedDevice>());
if (cinema) {
cinema->add_screen (screen);
}