diff --git a/gtk2_ardour/trigger_clip_picker.cc b/gtk2_ardour/trigger_clip_picker.cc
index f62bb2cab8..2bdfbdb88f 100644
--- a/gtk2_ardour/trigger_clip_picker.cc
+++ b/gtk2_ardour/trigger_clip_picker.cc
@@ -883,6 +883,9 @@ TriggerClipPicker::audition_processor_going_away ()
 void
 TriggerClipPicker::audition_processors_changed ()
 {
+	if (!_session || _session->deletion_in_progress () || ! _session->the_auditioner ()) {
+		_show_plugin_btn.set_sensitive (false);
+	}
 	boost::shared_ptr<PluginInsert> plugin_insert = boost::dynamic_pointer_cast<PluginInsert> (_session->the_auditioner ()->the_instrument ());
 	_show_plugin_btn.set_sensitive (plugin_insert != 0);
 }