SQL Updatable View with joined tables

I have a view that looks similar to this,

SELECT  dbo.Staff.StaffId, dbo.Staff.StaffName, dbo.StaffPreferences.filter_type
FROM    dbo.Staff LEFT OUTER JOIN
        dbo.StaffPreferences ON dbo.Staff.StaffId = dbo.StaffPreferences.StaffId

I'm trying to update StaffPreferences.filter_type using,

UPDATE vw_Staff SET filter_type=1 WHERE StaffId=25

I have read this in an MSDN article,

Any modifications, including UPDATE, INSERT, and DELETE statements, must reference columns from only one base table.

Does this mean that I can only update fields in dbo.Staff (which is all I can currently achieve) In this context does the definition of 'base table' not extend to any subsequently joined tables?