diff --git a/OvmfPkg/AcpiTables/Facp.aslc b/OvmfPkg/AcpiTables/Facp.aslc
index c55094b838..125e9b441d 100644
--- a/OvmfPkg/AcpiTables/Facp.aslc
+++ b/OvmfPkg/AcpiTables/Facp.aslc
@@ -59,7 +59,7 @@ EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE FACP = {
   DAY_ALRM,         // index to day-of-month alarm in RTC CMOS RAM
   MON_ALRM,         // index to month-of-year alarm in RTC CMOS RAM
   CENTURY,          // index to century in RTC CMOS RAM
-  0x03,             // Boot architecture flag
+  0x00,             // Boot architecture flag
   0x00,             // Boot architecture flag
   RESERVED,         // reserved
   FLAG