diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index fe5ec0a723..32033bc9d7 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -502,10 +502,11 @@ static void piix4_pm_init(Object *obj)
     PIIX4PMState *s = PIIX4_PM(obj);
 
     qdev_init_gpio_out(DEVICE(obj), &s->irq, 1);
+    qdev_init_gpio_out_named(DEVICE(obj), &s->smi_irq, "smi-irq", 1);
 }
 
 PIIX4PMState *piix4_pm_initfn(PCIBus *bus, int devfn, uint32_t smb_io_base,
-                              qemu_irq smi_irq, bool smm_enabled)
+                              bool smm_enabled)
 {
     PCIDevice *pci_dev;
     DeviceState *dev;
@@ -517,7 +518,6 @@ PIIX4PMState *piix4_pm_initfn(PCIBus *bus, int devfn, uint32_t smb_io_base,
     qdev_prop_set_bit(dev, "smm-enabled", smm_enabled);
 
     s = PIIX4_PM(dev);
-    s->smi_irq = smi_irq;
 
     pci_realize_and_unref(pci_dev, bus, &error_fatal);
 
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 27acba4146..89c4f07c9f 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -283,9 +283,10 @@ static void pc_init1(MachineState *machine,
         PIIX4PMState *piix4_pm;
 
         smi_irq = qemu_allocate_irq(pc_acpi_smi_interrupt, first_cpu, 0);
-        piix4_pm = piix4_pm_initfn(pci_bus, piix3_devfn + 3, 0xb100, smi_irq,
+        piix4_pm = piix4_pm_initfn(pci_bus, piix3_devfn + 3, 0xb100,
                                    x86_machine_is_smm_enabled(x86ms));
         qdev_connect_gpio_out(DEVICE(piix4_pm), 0, x86ms->gsi[9]);
+        qdev_connect_gpio_out_named(DEVICE(piix4_pm), "smi-irq", 0, smi_irq);
         pcms->smbus = I2C_BUS(qdev_get_child_bus(DEVICE(piix4_pm), "i2c"));
         /* TODO: Populate SPD eeprom data.  */
         smbus_eeprom_init(pcms->smbus, 8, NULL, 0);
diff --git a/hw/isa/piix4.c b/hw/isa/piix4.c
index 0b6ea22143..775e15eb20 100644
--- a/hw/isa/piix4.c
+++ b/hw/isa/piix4.c
@@ -311,7 +311,7 @@ DeviceState *piix4_create(PCIBus *pci_bus, ISABus **isa_bus, I2CBus **smbus)
 
     pci_create_simple(pci_bus, devfn + 2, "piix4-usb-uhci");
     if (smbus) {
-        pms = piix4_pm_initfn(pci_bus, devfn + 3, 0x1100, NULL, 0);
+        pms = piix4_pm_initfn(pci_bus, devfn + 3, 0x1100, 0);
         qdev_connect_gpio_out(DEVICE(pms), 0,
                               qdev_get_gpio_in_named(dev, "isa", 9));
         *smbus = I2C_BUS(qdev_get_child_bus(DEVICE(pms), "i2c"));
diff --git a/include/hw/southbridge/piix.h b/include/hw/southbridge/piix.h
index 105d158f78..b69e0dfb04 100644
--- a/include/hw/southbridge/piix.h
+++ b/include/hw/southbridge/piix.h
@@ -17,7 +17,7 @@
 #include "hw/acpi/piix4.h"
 
 PIIX4PMState *piix4_pm_initfn(PCIBus *bus, int devfn, uint32_t smb_io_base,
-                              qemu_irq smi_irq, bool smm_enabled);
+                              bool smm_enabled);
 
 /* PIRQRC[A:D]: PIRQx Route Control Registers */
 #define PIIX_PIRQCA 0x60