1 files changed, 2 insertions, 1 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 6e92ba61f7c0..7702e3d397bb 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -125,7 +125,8 @@ and is between 256 and 4096 characters. It is defined in the file
                         See header of drivers/scsi/53c7xx.c.
                         See also Documentation/scsi/ncr53c7xx.txt.
 
-        acpi=           [HW,ACPI] Advanced Configuration and Power Interface
+        acpi=           [HW,ACPI,X86-64,i386]
+                        Advanced Configuration and Power Interface
                         Format: { force | off | ht | strict | noirq }
                         force -- enable ACPI if default was off
                         off -- disable ACPI if default was on