diff --git a/hw/prep_pci.c b/hw/prep_pci.c
index 80e20ac..19f028c 100644
--- a/hw/prep_pci.c
+++ b/hw/prep_pci.c
@@ -128,7 +128,7 @@
     s->bus = pci_register_bus(NULL, "pci",
                               prep_set_irq, prep_map_irq, pic, 0, 4);
 
-    pci_host_config_register_ioport(0xcf8, s);
+    pci_host_conf_register_ioport(0xcf8, s);
 
     pci_host_data_register_ioport(0xcfc, s);