diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index c3bfacb..489815e 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1456,6 +1456,8 @@
 
 			* dump_id: dump IDENTIFY data.
 
+			* atapi_dmadir: Enable ATAPI DMADIR bridge support
+
 			If there are multiple matching configurations changing
 			the same attribute, the last one is used.