diff --git a/hw/piix4.c b/hw/piix4.c
index 6f08c5a..902d6da 100644
--- a/hw/piix4.c
+++ b/hw/piix4.c
@@ -105,7 +105,7 @@
 {
     PCIDevice *d;
 
-    d = pci_create_simple(bus, devfn, "PIIX4");
+    d = pci_create_simple_multifunction(bus, devfn, true, "PIIX4");
     return d->devfn;
 }