diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index bd9bbade7051..ea4182256d56 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -316,8 +316,9 @@ void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm,
 
     pm->smm_enabled = smm_enabled;
 
-    pm->enable_tco = true;
-    acpi_pm_tco_init(&pm->tco_regs, &pm->io);
+    if (pm->enable_tco) {
+        acpi_pm_tco_init(&pm->tco_regs, &pm->io);
+    }
 
     if (pm->use_acpi_hotplug_bridge) {
         acpi_pcihp_init(OBJECT(lpc_pci),
@@ -440,6 +441,7 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm)
     pm->s4_val = 2;
     pm->use_acpi_hotplug_bridge = true;
     pm->keep_pci_slot_hpc = true;
+    pm->enable_tco = true;
 
     object_property_add_uint32_ptr(obj, ACPI_PM_PROP_PM_IO_BASE,
                                    &pm->pm_io_base, OBJ_PROP_FLAG_READ);