diff --git a/plugins/stktest.c b/plugins/stktest.c
index 46a67e75..6f7413db 100644
--- a/plugins/stktest.c
+++ b/plugins/stktest.c
@@ -218,6 +218,7 @@ static void stktest_post_online(struct ofono_modem *modem)
 }
 
 static struct ofono_modem_driver stktest_driver = {
+	.modem_type	= OFONO_MODEM_TYPE_TEST,
 	.name		= "stktest",
 	.probe		= stktest_probe,
 	.remove		= stktest_remove,