diff --git a/Documentation/x86/boot.txt b/Documentation/x86/boot.txt
index 147bfe511cdda0d923ca1094a27daac02225af53..83c0033ee9e01d26866494b58115a1da9b2c429a 100644
--- a/Documentation/x86/boot.txt
+++ b/Documentation/x86/boot.txt
@@ -308,7 +308,7 @@ Protocol:	2.00+
 
 Field name:	start_sys
 Type:		read
-Offset/size:	0x20c/4
+Offset/size:	0x20c/2
 Protocol:	2.00+
 
   The load low segment (0x1000).  Obsolete.