diff --git a/MdePkg/Include/IndustryStandard/Acpi64.h b/MdePkg/Include/IndustryStandard/Acpi64.h
index efbfd8b7a5..5a0e5b29c7 100644
--- a/MdePkg/Include/IndustryStandard/Acpi64.h
+++ b/MdePkg/Include/IndustryStandard/Acpi64.h
@@ -174,7 +174,7 @@ typedef struct {
 /// FADT Version (as defined in ACPI 6.4 spec.)
 ///
 #define EFI_ACPI_6_4_FIXED_ACPI_DESCRIPTION_TABLE_REVISION  0x06
-#define EFI_ACPI_6_4_FIXED_ACPI_DESCRIPTION_TABLE_MINOR_REVISION  0x03
+#define EFI_ACPI_6_4_FIXED_ACPI_DESCRIPTION_TABLE_MINOR_REVISION  0x04
 
 //
 // Fixed ACPI Description Table Preferred Power Management Profile