diff --git a/gtk2_ardour/lv2_plugin_ui.cc b/gtk2_ardour/lv2_plugin_ui.cc
index 0ced96b9e3..98ccedce6a 100644
--- a/gtk2_ardour/lv2_plugin_ui.cc
+++ b/gtk2_ardour/lv2_plugin_ui.cc
@@ -30,6 +30,8 @@ using namespace Gtk;
 using namespace ARDOUR;
 using namespace PBD;
 
+SLV2UIHost LV2PluginUI::ui_host = NULL;
+
 void
 LV2PluginUI::lv2_ui_write(LV2UI_Controller controller,
                           uint32_t         port_index,
@@ -166,13 +168,15 @@ LV2PluginUI::lv2ui_instantiate(const std::string& title)
 	}
 
 #ifdef HAVE_NEW_SLV2
-	SLV2UIHost ui_host = slv2_ui_host_new(
-	        this, LV2PluginUI::lv2_ui_write, NULL, NULL, NULL);
+	if (!LV2PluginUI::ui_host) {
+		LV2PluginUI::ui_host = slv2_ui_host_new(
+	        LV2PluginUI::lv2_ui_write, NULL, NULL, NULL);
+	}
 	SLV2Value gtk_ui = slv2_value_new_uri(
-	        ARDOUR::PluginManager::the_manager()->lv2_world()->world,
-	        "http://lv2plug.in/ns/extensions/ui#GtkUI");
+		ARDOUR::PluginManager::the_manager()->lv2_world()->world,
+		"http://lv2plug.in/ns/extensions/ui#GtkUI");
 	_inst = slv2_ui_instance_new(
-	        _lv2->slv2_plugin(), _lv2->slv2_ui(), gtk_ui, ui_host, features_dst);
+		_lv2->slv2_plugin(), _lv2->slv2_ui(), gtk_ui, ui_host, this, features_dst);
 	slv2_value_free(gtk_ui);
 	slv2_ui_host_free(ui_host);
 #else
diff --git a/gtk2_ardour/lv2_plugin_ui.h b/gtk2_ardour/lv2_plugin_ui.h
index e267ecab6c..ec2f00360f 100644
--- a/gtk2_ardour/lv2_plugin_ui.h
+++ b/gtk2_ardour/lv2_plugin_ui.h
@@ -1,6 +1,6 @@
 /*
-    Copyright (C) 2008 Paul Davis
-    Author: Dave Robillard
+    Copyright (C) 2008-2011 Paul Davis
+    Author: David Robillard
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -78,6 +78,10 @@ class LV2PluginUI : public PlugUIBase, public Gtk::VBox
 
 	static void on_external_ui_closed(LV2UI_Controller controller);
 
+#ifdef HAVE_NEW_SLV2
+	static SLV2UIHost ui_host;
+#endif
+
 	static void lv2_ui_write(
 			LV2UI_Controller controller,
 			uint32_t         port_index,