I'd be careful with that phrasing. Empty desires are still "desirable." By pleasure he meant all that is pleasurable (yes, maybe that's a tautology), all that gives pleasure and not pain.
We're packing a lot into this conversaton already so I'll see about addressing that (whether empty desires are still pleasurable, even though they bring more pain in the end than pleasure) elsewhere rather than start a new line of citations, but your point is well taken. Every time we stray from focusing on "pleasure" there are new explanations required, and that is one of the major themes of this whole conversation.