--- a/trunk/src/LV2/gx_duck_delay_st.lv2/gx_duck_delay_st.ttl
+++ b/trunk/src/LV2/gx_duck_delay_st.lv2/gx_duck_delay_st.ttl
@@ -48,6 +48,8 @@
     lv2:project <http://guitarix.sourceforge.net/plugins/gx_duck_delay_st_> ;
     lv2:optionalFeature lv2:hardRTCapable ;
       
+	guiext:ui <http://guitarix.sourceforge.net/plugins/gx_duck_delay_st_#gui>;
+
     lv2:minorVersion 28;
     lv2:microVersion 3;
 
@@ -157,3 +159,8 @@
         mod:screenshot <modgui/screenshot-gxduck_delay_st.png>;
         mod:thumbnail <modgui/thumb-gxduck_delay_st.png>;
     ].
+
+<http://guitarix.sourceforge.net/plugins/gx_duck_delay_st_#gui>
+  a guiext:GtkUI;
+  guiext:binary <gx_duck_delay_st_gui.so>;
+  guiext:requiredFeature guiext:makeResident .