diff --git a/hw/puv3.c b/hw/puv3.c
index 271df97d3b..43f7216e4e 100644
--- a/hw/puv3.c
+++ b/hw/puv3.c
@@ -119,6 +119,7 @@ static QEMUMachine puv3_machine = {
     .name = "puv3",
     .desc = "PKUnity Version-3 based on UniCore32",
     .init = puv3_init,
+    .is_default = 1,
     .use_scsi = 0,
 };