diff --git a/gtk2_ardour/export_channel_selector.cc b/gtk2_ardour/export_channel_selector.cc
index 6f32ae783e..10e3135b53 100644
--- a/gtk2_ardour/export_channel_selector.cc
+++ b/gtk2_ardour/export_channel_selector.cc
@@ -110,8 +110,10 @@ PortExportChannelSelector::fill_route_list ()
 
 	/* Add master bus and then everything else */
 
-	ARDOUR::IO* master = _session->master_out()->output().get();
-	channel_view.add_route (master);
+	if (_session->master_out()) {
+		ARDOUR::IO* master = _session->master_out()->output().get();
+		channel_view.add_route (master);
+	}
 
 	for (RouteList::iterator it = routes.begin(); it != routes.end(); ++it) {
 		if ((*it)->is_master () || (*it)->is_monitor ()) {
diff --git a/libs/ardour/export_profile_manager.cc b/libs/ardour/export_profile_manager.cc
index deeb3aea2b..388ffe2508 100644
--- a/libs/ardour/export_profile_manager.cc
+++ b/libs/ardour/export_profile_manager.cc
@@ -501,6 +501,8 @@ ExportProfileManager::init_channel_configs (XMLNodeList nodes)
 		channel_configs.push_back (config);
 
 		// Add master outs as default
+		if (!session.master_out()) { return false; }
+
 		IO* master_out = session.master_out()->output().get();
 		if (!master_out) { return false; }