diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 609baf4cec..68e40d938f 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1982,6 +1982,16 @@ build_ssdt(GArray *table_data, GArray *linker,
         build_piix4_pci_hotplug(ssdt);
         build_piix4_pci0_int(ssdt);
     } else {
+        sb_scope = aml_scope("_SB");
+        aml_append(sb_scope,
+            aml_operation_region("PCST", AML_SYSTEM_IO, 0xae00, 0x0c));
+        aml_append(sb_scope,
+            aml_operation_region("PCSB", AML_SYSTEM_IO, 0xae0c, 0x01));
+        field = aml_field("PCSB", AML_ANY_ACC, AML_NOLOCK, AML_WRITE_AS_ZEROS);
+        aml_append(field, aml_named_field("PCIB", 8));
+        aml_append(sb_scope, field);
+        aml_append(ssdt, sb_scope);
+
         sb_scope = aml_scope("_SB");
         dev = aml_device("PCI0");
         aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A08")));
diff --git a/hw/i386/q35-acpi-dsdt.dsl b/hw/i386/q35-acpi-dsdt.dsl
index f234f5c03a..3ecdb5096e 100644
--- a/hw/i386/q35-acpi-dsdt.dsl
+++ b/hw/i386/q35-acpi-dsdt.dsl
@@ -36,10 +36,5 @@ DefinitionBlock (
 {
 
     Scope(\_SB) {
-        OperationRegion(PCST, SystemIO, 0xae00, 0x0c)
-        OperationRegion(PCSB, SystemIO, 0xae0c, 0x01)
-        Field(PCSB, AnyAcc, NoLock, WriteAsZeros) {
-            PCIB, 8,
-        }
     }
 }