diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index be01efdede32242b54b0d9c6c2e63b5f506cf42e..f876a3776c755629cf84ffea9c448be907100306 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -1361,6 +1361,7 @@ struct acpi_pdtt_channel {
 
 #define ACPI_PDTT_RUNTIME_TRIGGER           (1)
 #define ACPI_PDTT_WAIT_COMPLETION           (1<<1)
+#define ACPI_PDTT_TRIGGER_ORDER             (1<<2)
 
 /*******************************************************************************
  *