diff --git a/libs/ardour/auditioner.cc b/libs/ardour/auditioner.cc
index eec65f07f6..f2122cef27 100644
--- a/libs/ardour/auditioner.cc
+++ b/libs/ardour/auditioner.cc
@@ -570,6 +570,14 @@ Auditioner::output_changed (IOChange change, void* /*src*/)
 		vector<string> connections;
 		vector<string> outputs;
 		_session.engine().get_physical_outputs (DataType::AUDIO, outputs);
+
+		if (_session.monitor_out () && _output->connected_to (_session.monitor_out ()->input ())) {
+			Config->set_auditioner_output_left ("default");
+			Config->set_auditioner_output_right ("default");
+			via_monitor = true;
+			return;
+		}
+
 		if (_output->nth (0)->get_connections (connections)) {
 			if (outputs.size() > 0) {
 				phys = outputs[0];