diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index 5c7dfb2c69..5e8f8a7eaf 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -388,9 +388,8 @@ static void ich9_pm_set_keep_pci_slot_hpc(Object *obj, bool value, Error **errp)
     s->pm.keep_pci_slot_hpc = value;
 }
 
-void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm)
+void ich9_pm_reset_properties(ICH9LPCPMRegs *pm)
 {
-    static const uint32_t gpe0_len = ICH9_PMIO_GPE0_LEN;
     pm->acpi_memory_hotplug.is_enabled = true;
     pm->disable_s3 = 0;
     pm->disable_s4 = 0;
@@ -398,6 +397,11 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm)
     pm->acpi_pci_hotplug.use_acpi_hotplug_bridge = true;
     pm->keep_pci_slot_hpc = true;
     pm->enable_tco = true;
+}
+
+void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm)
+{
+    static const uint32_t gpe0_len = ICH9_PMIO_GPE0_LEN;
 
     object_property_add_uint32_ptr(obj, ACPI_PM_PROP_PM_IO_BASE,
                                    &pm->pm_io_base, OBJ_PROP_FLAG_READ);
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
index 9cec18a378..edf9783ec8 100644
--- a/hw/isa/lpc_ich9.c
+++ b/hw/isa/lpc_ich9.c
@@ -701,6 +701,7 @@ static void ich9_lpc_initfn(Object *obj)
                                    &lpc->smi_negotiated_features,
                                    OBJ_PROP_FLAG_READ);
 
+    ich9_pm_reset_properties(&lpc->pm);
     ich9_pm_add_properties(obj, &lpc->pm);
 }
 
diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h
index 019f0915c1..30990fcef5 100644
--- a/include/hw/acpi/ich9.h
+++ b/include/hw/acpi/ich9.h
@@ -81,6 +81,8 @@ void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm, qemu_irq sci_irq);
 void ich9_pm_iospace_update(ICH9LPCPMRegs *pm, uint32_t pm_io_base);
 extern const VMStateDescription vmstate_ich9_pm;
 
+void ich9_pm_reset_properties(ICH9LPCPMRegs *pm);
+
 void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm);
 
 void ich9_pm_device_pre_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,