1 files changed, 1 insertions, 1 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b182626739ea..319785b6dcb1 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -134,7 +134,7 @@ and is between 256 and 4096 characters. It is defined in the file
 
         acpi=           [HW,ACPI,X86-64,i386]
                         Advanced Configuration and Power Interface
-                        Format: { force | off | ht | strict | noirq }
+                        Format: { force | off | ht | strict | noirq | rsdt }
                         force -- enable ACPI if default was off
                         off -- disable ACPI if default was on
                         noirq -- do not use ACPI for IRQ routing