diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index c50ef7e6b94252bab51e09a5db207f15df6b8157..af2c321b17cf3243e0336469acf34d3b8cfd203e 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)
 
 /*******************************************************************************
  *