diff --git a/doc/Support/FAQ.md b/doc/Support/FAQ.md
index ef6d6232e9..4fb4d74cb1 100644
--- a/doc/Support/FAQ.md
+++ b/doc/Support/FAQ.md
@@ -103,7 +103,8 @@ To go into a bit more detail, the following are usually needed:
 **includes/definitions.inc.php**
 Update this file to include the required definitions for the new OS.
 **includes/discovery/os/ciscowlc.inc.php**
-This file just sets the $os variable, done by checking the sysDescr snmp value for a particular value that matches the OS you are adding.
+This file just sets the $os variable, done by checking the SNMP tree for a particular value that matches the OS you are adding.  Typically, this will come from the presence of specific values in
+sysObjectID or sysDescr, or the existence of a particular enterprise tree.
 **includes/polling/os/ciscowlc.inc.php**
 This file will usually set the variables for $version and $hardware gained from an snmp lookup.
 **html/images/os/$os.png**