diff --git a/hw/openrisc_sim.c b/hw/openrisc_sim.c
index 55e97f0..13631ea 100644
--- a/hw/openrisc_sim.c
+++ b/hw/openrisc_sim.c
@@ -139,6 +139,9 @@ static QEMUMachine openrisc_sim_machine = {
     .desc = "or32 simulation",
     .init = openrisc_sim_init,
     .max_cpus = 1,
+    .no_floppy = 1,
+    .no_cdrom = 1,
+    .no_sdcard = 1,
     .is_default = 1,
 };