diff --git a/ptap/Makefile b/ptap/Makefile
index e8002b7..7ab69ce 100644
--- a/ptap/Makefile
+++ b/ptap/Makefile
@@ -2,30 +2,24 @@ CFLAGS := -Wall -O3 -g -D_GNU_SOURCE
 LDFLAGS := -lm
 
 CFLAGS += `pkg-config lv2core --cflags`
-LDFLAGS += `pkg-config lv2ore --libs`
+LDFLAGS += `pkg-config lv2core --libs`
 
 PTAPSRC := ptap.c
+PTAPSRC += ptapui.c
 PTAPOBJ := $(PTAPSRC:.c=.o)
 PTAPO := ptap.so
 
-DUCKERSRC := ducker.c
-DUCKEROBJ := $(DUCKERSRC:.c=.o)
-DUCKERO := ducker.so
-
-all: $(PTAPO) $(DUCKERO)
+all: $(PTAPO)
 
 clean:
-	rm $(PTAPOBJ) $(PTAPO) $(DUCKEROBJ) $(DUCKERO)
+	rm $(PTAPOBJ) $(PTAPO)
 
 depend:
-	makedepend $(PTAPSRC) $(DUCKERSRC)
+	makedepend $(PTAPSRC)
 
 $(PTAPO): $(PTAPOBJ)
 	$(CC) -shared -fPIC -Wl,-soname,$(PTAPO) $(PTAPOBJ) -o $@
 
-$(DUCKERO): $(DUCKEROBJ)
-	$(CC) -shared -fPIC -Wl,-soname,$(DUCKERO) $(DUCKEROBJ) -o $@
-
 .c.o:
 	$(CC) -c -fPIC $(CFLAGS) $< -o $@
 
diff --git a/ptap/ptapui.c b/ptap/ptapui.c
new file mode 100644
index 0000000..a2484ec
--- /dev/null
+++ b/ptap/ptapui.c
@@ -0,0 +1,49 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <lv2.h>
+#include <lv2/lv2plug.in/ns/extensions/ui/ui.h>
+
+static LV2UI_Handle ptapui_instantiate(
+	const LV2UI_Descriptor *descriptor,
+	const char *plugin_uri,
+	const char *bundle_path,
+	LV2UI_Write_Function write_function,
+	LV2UI_Controller controller,
+	LV2UI_Widget *widget,
+	const LV2_Feature *const *host_features)
+{
+	return NULL;
+}
+
+static void ptapui_cleanup(LV2UI_Handle ui)
+{
+}
+
+static void ptapui_port_event(
+	LV2UI_Handle ui,
+	uint32_t port_index,
+	uint32_t buffer_size,
+	uint32_t format,
+	const void *buffer)
+{
+}
+
+static const LV2UI_Descriptor s_lv2uidescriptor =
+{
+	.URI = "http://fuzzle.org/~petern/ptapui/1",
+	.instantiate = &ptapui_instantiate,
+	.cleanup = &ptapui_cleanup,
+	.port_event = &ptapui_port_event,
+	.extension_data = NULL,
+};
+
+const LV2UI_Descriptor *lv2ui_descriptor(uint32_t index)
+{
+	if (index == 0) {
+		return &s_lv2uidescriptor;
+	}
+
+	return NULL;
+}