diff --git a/tools/hwsim.c b/tools/hwsim.c
index eed9903e..91963d54 100644
--- a/tools/hwsim.c
+++ b/tools/hwsim.c
@@ -2186,7 +2186,7 @@ static void ready_callback(void *user_data)
 	l_dbus_name_acquire(dbus, HWSIM_SERVICE, false, false, true,
 				request_name_callback, NULL);
 
-	if (!l_dbus_object_manager_enable(dbus))
+	if (!l_dbus_object_manager_enable(dbus, "/"))
 		l_info("Unable to register the ObjectManager");
 }