diff --git a/gtk2_ardour/lv2_plugin_ui.cc b/gtk2_ardour/lv2_plugin_ui.cc
index 3a73453dbe..ead7440b3a 100644
--- a/gtk2_ardour/lv2_plugin_ui.cc
+++ b/gtk2_ardour/lv2_plugin_ui.cc
@@ -31,7 +31,8 @@ using namespace ARDOUR;
 using namespace PBD;
 
 #ifdef HAVE_NEW_SLV2
-SLV2UIHost LV2PluginUI::ui_host = NULL;
+SLV2UIHost LV2PluginUI::ui_host  = NULL;
+SLV2Value  LV2PluginUI::ui_GtkUI = NULL;
 #endif
 
 void
@@ -171,16 +172,14 @@ LV2PluginUI::lv2ui_instantiate(const std::string& title)
 
 #ifdef HAVE_NEW_SLV2
 	if (!LV2PluginUI::ui_host) {
+		LV2PluginUI::ui_GtkUI = slv2_value_new_uri(
+			ARDOUR::PluginManager::the_manager()->lv2_world()->world,
+			"http://lv2plug.in/ns/extensions/ui#GtkUI");
 		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");
 	_inst = slv2_ui_instance_new(
-		_lv2->slv2_plugin(), _lv2->slv2_ui(), gtk_ui, ui_host, this, features_dst);
-	slv2_value_free(gtk_ui);
-	slv2_ui_host_free(ui_host);
+		_lv2->slv2_plugin(), _lv2->slv2_ui(), ui_GtkUI, ui_host, this, features_dst);
 #else
 	_inst = slv2_ui_instantiate(
 	        _lv2->slv2_plugin(), _lv2->slv2_ui(), LV2PluginUI::lv2_ui_write, this,
diff --git a/gtk2_ardour/lv2_plugin_ui.h b/gtk2_ardour/lv2_plugin_ui.h
index ec2f00360f..158c7cb2e0 100644
--- a/gtk2_ardour/lv2_plugin_ui.h
+++ b/gtk2_ardour/lv2_plugin_ui.h
@@ -80,6 +80,7 @@ class LV2PluginUI : public PlugUIBase, public Gtk::VBox
 
 #ifdef HAVE_NEW_SLV2
 	static SLV2UIHost ui_host;
+	static SLV2Value  ui_GtkUI;
 #endif
 
 	static void lv2_ui_write(