I am trying to clean up the interfaces exposed in one of my projects, and am going through and marking some modules as internal. I keep running into error "FS0191: Type abbreviations must be public. If you want to use a private type abbreviation you must use an explicit signature."

The following code is an example:

module internal QueueManager =

// some type definitions that are only used inside this module:
type BoundedBlockingQueue<'a> = ....
type QueueEntry = ...

// type abbreviation that gives the error:
type InternalQueue =BoundedBlockingQueue<QueueEntry>

this gives an error -- that seems kind of goofy to me... is this a limitation that will be removed in future releases of f#? Or is there a better way of encapsulating code?