Burton Albion manager Jimmy Floyd Hasselbaink says signings in January will lead to departures as he focuses on working with a small squad.
The Dutchman has a squad of 20 fit first-team players, with four loan players also at his disposal.
"I want a quality squad," Hasselbaink, 42, told BBC Radio Derby.
"If you have too big a squad, you lose your focus at times because there are just too many people. If I bring people in, then certain players will go out."
Burton, currently second in League Two, will soon be boosted by the return of winger Jimmy Phillips as he nears a return after eight months out with a knee injury.
Former Leeds, Chelsea and Netherlands striker Hasselbaink says he is eager to recruit when the transfer window reopens, having inherited his squad from Gary Rowett when he took charge at the Pirelli Stadium last month.
"There are a few positions that I think I have to do something," said ex-Royal Antwerp boss Hasselbaink. "You are always doing your homework and always wanting to improve the squad."
Hasselbaink has already started talks with Blackburn Rovers to extend Darragh Lenihan's loan stay with the Brewers.