diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b874771385cda9df928fc651dee1e7585c6a08ff..75205391b335f85c9b8a599d0d3b4c0dd1a8b41b 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1034,6 +1034,8 @@ running once the system is up.
 
 	nomce		[IA-32] Machine Check Exception
 
+	nomca		[IA-64] Disable machine check abort handling
+
 	noresidual	[PPC] Don't use residual data on PReP machines.
 
 	noresume	[SWSUSP] Disables resume and restores original swap