diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 5fd1bcf08e..905dc4a219 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -274,13 +274,12 @@ int pci_find_domain(const PCIBus *bus)
     return -1;
 }
 
-void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
+static void pci_bus_init(PCIBus *bus, DeviceState *parent,
                          const char *name,
                          MemoryRegion *address_space_mem,
                          MemoryRegion *address_space_io,
                          uint8_t devfn_min)
 {
-    qbus_create_inplace(&bus->qbus, TYPE_PCI_BUS, parent, name);
     assert(PCI_FUNC(devfn_min) == 0);
     bus->devfn_min = devfn_min;
     bus->address_space_mem = address_space_mem;
@@ -293,6 +292,17 @@ void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
     vmstate_register(NULL, -1, &vmstate_pcibus, bus);
 }
 
+void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
+                         const char *name,
+                         MemoryRegion *address_space_mem,
+                         MemoryRegion *address_space_io,
+                         uint8_t devfn_min)
+{
+    qbus_create_inplace(bus, TYPE_PCI_BUS, parent, name);
+    pci_bus_init(bus, parent, name, address_space_mem,
+                 address_space_io, devfn_min);
+}
+
 PCIBus *pci_bus_new(DeviceState *parent, const char *name,
                     MemoryRegion *address_space_mem,
                     MemoryRegion *address_space_io,
@@ -300,10 +310,9 @@ PCIBus *pci_bus_new(DeviceState *parent, const char *name,
 {
     PCIBus *bus;
 
-    bus = g_malloc0(sizeof(*bus));
-    pci_bus_new_inplace(bus, parent, name, address_space_mem,
-                        address_space_io, devfn_min);
-    OBJECT(bus)->free = g_free;
+    bus = PCI_BUS(qbus_create(TYPE_PCI_BUS, parent, name));
+    pci_bus_init(bus, parent, name, address_space_mem,
+                 address_space_io, devfn_min);
     return bus;
 }