diff --git a/include/acpi/acpi_table.h b/include/acpi/acpi_table.h
index 48f8ce248fd..7ee3248ff61 100644
--- a/include/acpi/acpi_table.h
+++ b/include/acpi/acpi_table.h
@@ -841,12 +841,14 @@ enum acpi_tables {
 	ACPITAB_ECDT,
 	ACPITAB_FACS,
 	ACPITAB_FADT,
+	ACPITAB_GTDT,
 	ACPITAB_HEST,
 	ACPITAB_HPET,
 	ACPITAB_IVRS,
 	ACPITAB_MADT,
 	ACPITAB_MCFG,
 	ACPITAB_NHLT,
+	ACPITAB_PPTT,
 	ACPITAB_RSDP,
 	ACPITAB_RSDT,
 	ACPITAB_SLIT,
diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c
index 959cac9e2e3..2dc7b998e22 100644
--- a/lib/acpi/acpi_table.c
+++ b/lib/acpi/acpi_table.c
@@ -107,6 +107,10 @@ int acpi_get_table_revision(enum acpi_tables table)
 		return 1;
 	case ACPITAB_SPCR:
 		return 2;
+	case ACPITAB_PPTT: /* ACPI 6.2: 1 */
+		return 1;
+	case ACPITAB_GTDT: /* ACPI 6.2: 2, ACPI 6.3: 3 */
+		return 2;
 	default:
 		return -EINVAL;
 	}