diff --git a/client/dbus-proxy.c b/client/dbus-proxy.c
index 536ef000..35fe9587 100644
--- a/client/dbus-proxy.c
+++ b/client/dbus-proxy.c
@@ -321,6 +321,18 @@ static void dbus_disconnect_callback(void *user_data)
 	l_main_quit();
 }
 
+void proxy_interface_type_register(
+			const struct proxy_interface_type *interface_type)
+{
+	l_queue_push_tail(proxy_interface_types, (void *) interface_type);
+}
+
+void proxy_interface_type_unregister(
+			const struct proxy_interface_type *interface_type)
+{
+	l_queue_remove(proxy_interface_types, (void *) interface_type);
+}
+
 bool dbus_proxy_init(void)
 {
 	if (dbus)
diff --git a/client/dbus-proxy.h b/client/dbus-proxy.h
index cc9abf95..1491856f 100644
--- a/client/dbus-proxy.h
+++ b/client/dbus-proxy.h
@@ -42,5 +42,10 @@ struct proxy_interface_type {
 struct proxy_interface *proxy_interface_find(const char *interface,
 							const char *path);
 
+void proxy_interface_type_register(
+			const struct proxy_interface_type *interface_type);
+void proxy_interface_type_unregister(
+			const struct proxy_interface_type *interface_type);
+
 bool dbus_proxy_init(void);
 bool dbus_proxy_exit(void);