diff --git a/dbus_service.h b/dbus_service.h
index 40cb987..4b760ce 100644
--- a/dbus_service.h
+++ b/dbus_service.h
@@ -57,6 +57,11 @@
 gboolean update_engine_service_check_for_update(UpdateEngineService* self,
                                                 GError **error);
 
+gboolean update_engine_service_attempt_update(UpdateEngineService* self,
+                                              gchar* app_version,
+                                              gchar* omaha_url,
+                                              GError **error);
+
 gboolean update_engine_service_emit_status_update(
     UpdateEngineService* self,
     gint64 last_checked_time,