diff --git a/libs/ardour/ltc_slave.cc b/libs/ardour/ltc_slave.cc
index 2117020e92..62fde9dd2b 100644
--- a/libs/ardour/ltc_slave.cc
+++ b/libs/ardour/ltc_slave.cc
@@ -81,7 +81,7 @@ LTC_TransportMaster::init ()
 void
 LTC_TransportMaster::create_port ()
 {
-	if ((_port = AudioEngine::instance()->register_input_port (DataType::AUDIO, string_compose ("%1 in", _name, false, TransportMasterPort))) == 0) {
+	if ((_port = AudioEngine::instance()->register_input_port (DataType::AUDIO, string_compose ("%1 in", _name), false, TransportMasterPort)) == 0) {
 		throw failed_constructor();
 	}
 }