diff --git a/hw/ppc/prep.c b/hw/ppc/prep.c
index 6689407b3d..3401570d98 100644
--- a/hw/ppc/prep.c
+++ b/hw/ppc/prep.c
@@ -682,6 +682,7 @@ static void prep_machine_init(MachineClass *mc)
     mc->max_cpus = MAX_CPUS;
     mc->default_boot_order = "cad";
     mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("602");
+    mc->default_display = "std";
 }
 
 static int prep_set_cmos_checksum(DeviceState *dev, void *opaque)
@@ -888,6 +889,7 @@ static void ibm_40p_machine_init(MachineClass *mc)
     mc->block_default_type = IF_SCSI;
     mc->default_boot_order = "c";
     mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("604");
+    mc->default_display = "std";
 }
 
 DEFINE_MACHINE("40p", ibm_40p_machine_init)