diff --git a/doc/mgmt-api.txt b/doc/mgmt-api.txt
index c38ec51..d738feb 100644
--- a/doc/mgmt-api.txt
+++ b/doc/mgmt-api.txt
@@ -101,8 +101,12 @@ Set Discoverable Command
 	Command Code:		0x0006
 	Controller Index:	<controller id>
 	Command Parameters:	Discoverable (1 Octet)
+				Timeout (2 Octets)
 	Return Parameters:	Discoverable (1 Octet)
 
+	Timeout is the time in seconds and is only meningful when
+	Discoverable is set to 1.
+
 
 Set Connectable Command
 =======================