diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 4e78083a9db89b3f1cb287659d8b7299a10790a1..484689264c36a137458130995ed36bcd94011292 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -956,6 +956,8 @@ static void virt_class_init(ObjectClass *oc, void *data)
     mc->init = machvirt_init;
     mc->max_cpus = 8;
     mc->has_dynamic_sysbus = true;
+    mc->block_default_type = IF_VIRTIO;
+    mc->no_cdrom = 1;
 }
 
 static const TypeInfo machvirt_info = {