diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index deb440f286..b85fefe931 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -128,7 +128,7 @@ static void acpi_get_pm_info(AcpiPmInfo *pm)
 {
     Object *piix = piix4_pm_find();
     Object *lpc = ich9_lpc_find();
-    Object *obj = NULL;
+    Object *obj = piix ? piix : lpc;
     QObject *o;
 
     pm->force_rev1_fadt = false;
@@ -138,7 +138,6 @@ static void acpi_get_pm_info(AcpiPmInfo *pm)
     if (piix) {
         /* w2k requires FADT(rev1) or it won't boot, keep PC compatible */
         pm->force_rev1_fadt = true;
-        obj = piix;
         pm->cpu_hp_io_base = PIIX4_CPU_HOTPLUG_IO_BASE;
         pm->pcihp_io_base =
             object_property_get_uint(obj, ACPI_PCIHP_IO_BASE_PROP, NULL);
@@ -146,7 +145,6 @@ static void acpi_get_pm_info(AcpiPmInfo *pm)
             object_property_get_uint(obj, ACPI_PCIHP_IO_LEN_PROP, NULL);
     }
     if (lpc) {
-        obj = lpc;
         pm->cpu_hp_io_base = ICH9_CPU_HOTPLUG_IO_BASE;
     }
     assert(obj);