diff --git a/hw/acpi_ich9.c b/hw/acpi_ich9.c
index 37a50e6d7b..d2f9808242 100644
--- a/hw/acpi_ich9.c
+++ b/hw/acpi_ich9.c
@@ -202,11 +202,13 @@ static void pm_powerdown_req(Notifier *n, void *opaque)
     acpi_pm1_evt_power_down(&pm->acpi_regs);
 }
 
-void ich9_pm_init(ICH9LPCPMRegs *pm, qemu_irq sci_irq, qemu_irq cmos_s3)
+void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm,
+                  qemu_irq sci_irq, qemu_irq cmos_s3)
 {
     memory_region_init(&pm->io, "ich9-pm", ICH9_PMIO_SIZE);
     memory_region_set_enabled(&pm->io, false);
-    memory_region_add_subregion(get_system_io(), 0, &pm->io);
+    memory_region_add_subregion(pci_address_space_io(lpc_pci),
+                                0, &pm->io);
 
     acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
     acpi_pm1_evt_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
diff --git a/hw/acpi_ich9.h b/hw/acpi_ich9.h
index bc221d3cbc..ecb82abc65 100644
--- a/hw/acpi_ich9.h
+++ b/hw/acpi_ich9.h
@@ -30,9 +30,11 @@ typedef struct ICH9LPCPMRegs {
      * PM1a_CNT_BLK = 2 in FADT so it is defined as uint16_t.
      */
     ACPIREGS acpi_regs;
+
     MemoryRegion io;
     MemoryRegion io_gpe;
     MemoryRegion io_smi;
+
     uint32_t smi_en;
     uint32_t smi_sts;
 
@@ -42,7 +44,7 @@ typedef struct ICH9LPCPMRegs {
     Notifier powerdown_notifier;
 } ICH9LPCPMRegs;
 
-void ich9_pm_init(ICH9LPCPMRegs *pm,
+void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm,
                   qemu_irq sci_irq, qemu_irq cmos_s3_resume);
 void ich9_pm_iospace_update(ICH9LPCPMRegs *pm, uint32_t pm_io_base);
 extern const VMStateDescription vmstate_ich9_pm;
diff --git a/hw/lpc_ich9.c b/hw/lpc_ich9.c
index a068715c04..16843d76bc 100644
--- a/hw/lpc_ich9.c
+++ b/hw/lpc_ich9.c
@@ -336,7 +336,7 @@ void ich9_lpc_pm_init(PCIDevice *lpc_pci, qemu_irq cmos_s3)
     qemu_irq *sci_irq;
 
     sci_irq = qemu_allocate_irqs(ich9_set_sci, lpc, 1);
-    ich9_pm_init(&lpc->pm, sci_irq[0], cmos_s3);
+    ich9_pm_init(lpc_pci, &lpc->pm, sci_irq[0], cmos_s3);
 
     ich9_lpc_reset(&lpc->d.qdev);
 }