diff --git a/hw/isa/piix4.c b/hw/isa/piix4.c
index 0c34e3717c..c12388ddac 100644
--- a/hw/isa/piix4.c
+++ b/hw/isa/piix4.c
@@ -42,32 +42,10 @@
 #include "sysemu/runstate.h"
 #include "qom/object.h"
 
-struct PIIX4State {
-    PCIDevice dev;
-
-    ProxyPICState pic;
-    RTCState rtc;
-    PCIIDEState ide;
-    UHCIState uhci;
-    PIIX4PMState pm;
-
-    uint32_t smb_io_base;
-
-    /* Reset Control Register */
-    MemoryRegion rcr_mem;
-    uint8_t rcr;
-
-    bool has_acpi;
-    bool has_usb;
-    bool smm_enabled;
-};
-
-OBJECT_DECLARE_SIMPLE_TYPE(PIIX4State, PIIX4_PCI_DEVICE)
-
 static void piix4_set_irq(void *opaque, int irq_num, int level)
 {
     int i, pic_irq, pic_level;
-    PIIX4State *s = opaque;
+    PIIXState *s = opaque;
     PCIBus *bus = pci_get_bus(&s->dev);
 
     /* now we change the pic irq level according to the piix irq mappings */
@@ -112,7 +90,7 @@ static int pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
 
 static void piix4_isa_reset(DeviceState *dev)
 {
-    PIIX4State *d = PIIX4_PCI_DEVICE(dev);
+    PIIXState *d = PIIX_PCI_DEVICE(dev);
     uint8_t *pci_conf = d->dev.config;
 
     pci_conf[0x04] = 0x07; // master, memory and I/O
@@ -147,12 +125,13 @@ static void piix4_isa_reset(DeviceState *dev)
     pci_conf[0xac] = 0x00;
     pci_conf[0xae] = 0x00;
 
+    d->pic_levels = 0; /* not used in PIIX4 */
     d->rcr = 0;
 }
 
 static int piix4_post_load(void *opaque, int version_id)
 {
-    PIIX4State *s = opaque;
+    PIIXState *s = opaque;
 
     if (version_id == 2) {
         s->rcr = 0;
@@ -167,8 +146,8 @@ static const VMStateDescription vmstate_piix4 = {
     .minimum_version_id = 2,
     .post_load = piix4_post_load,
     .fields = (VMStateField[]) {
-        VMSTATE_PCI_DEVICE(dev, PIIX4State),
-        VMSTATE_UINT8_V(rcr, PIIX4State, 3),
+        VMSTATE_PCI_DEVICE(dev, PIIXState),
+        VMSTATE_UINT8_V(rcr, PIIXState, 3),
         VMSTATE_END_OF_LIST()
     }
 };
@@ -176,7 +155,7 @@ static const VMStateDescription vmstate_piix4 = {
 static void piix4_rcr_write(void *opaque, hwaddr addr, uint64_t val,
                             unsigned int len)
 {
-    PIIX4State *s = opaque;
+    PIIXState *s = opaque;
 
     if (val & 4) {
         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
@@ -188,7 +167,7 @@ static void piix4_rcr_write(void *opaque, hwaddr addr, uint64_t val,
 
 static uint64_t piix4_rcr_read(void *opaque, hwaddr addr, unsigned int len)
 {
-    PIIX4State *s = opaque;
+    PIIXState *s = opaque;
 
     return s->rcr;
 }
@@ -205,7 +184,7 @@ static const MemoryRegionOps piix4_rcr_ops = {
 
 static void piix4_realize(PCIDevice *dev, Error **errp)
 {
-    PIIX4State *s = PIIX4_PCI_DEVICE(dev);
+    PIIXState *s = PIIX_PCI_DEVICE(dev);
     PCIBus *pci_bus = pci_get_bus(dev);
     ISABus *isa_bus;
 
@@ -275,7 +254,7 @@ static void piix4_realize(PCIDevice *dev, Error **errp)
 
 static void piix4_init(Object *obj)
 {
-    PIIX4State *s = PIIX4_PCI_DEVICE(obj);
+    PIIXState *s = PIIX_PCI_DEVICE(obj);
 
     object_initialize_child(obj, "pic", &s->pic, TYPE_PROXY_PIC);
     object_initialize_child(obj, "rtc", &s->rtc, TYPE_MC146818_RTC);
@@ -283,10 +262,10 @@ static void piix4_init(Object *obj)
 }
 
 static Property piix4_props[] = {
-    DEFINE_PROP_UINT32("smb_io_base", PIIX4State, smb_io_base, 0),
-    DEFINE_PROP_BOOL("has-acpi", PIIX4State, has_acpi, true),
-    DEFINE_PROP_BOOL("has-usb", PIIX4State, has_usb, true),
-    DEFINE_PROP_BOOL("smm-enabled", PIIX4State, smm_enabled, false),
+    DEFINE_PROP_UINT32("smb_io_base", PIIXState, smb_io_base, 0),
+    DEFINE_PROP_BOOL("has-acpi", PIIXState, has_acpi, true),
+    DEFINE_PROP_BOOL("has-usb", PIIXState, has_usb, true),
+    DEFINE_PROP_BOOL("smm-enabled", PIIXState, smm_enabled, false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
@@ -314,7 +293,7 @@ static void piix4_class_init(ObjectClass *klass, void *data)
 static const TypeInfo piix4_info = {
     .name          = TYPE_PIIX4_PCI_DEVICE,
     .parent        = TYPE_PCI_DEVICE,
-    .instance_size = sizeof(PIIX4State),
+    .instance_size = sizeof(PIIXState),
     .instance_init = piix4_init,
     .class_init    = piix4_class_init,
     .interfaces = (InterfaceInfo[]) {
