The Loftus Road boss has held a meeting with the club’s owners to go over what he wants in next month’s window.
Warnock is adamant that his squad needs strengthening but insists he will only bring in players that are needed.
He told Sky Sports News: “I won’t be doing anything just for the sake of it.
“We've seen who we want and we do need improving, but I'd like to think this will be the final January in which we need three or four new players.
"If you do your business right and you establish yourself, then you do your business in the summer, but that wasn't really possible for us this season.
"It's been a difficult period to get people in and then integrate them all."
QPR were without Anton Ferdinand for the 2-0 defeat to Manchester United on Sunday and Warnock has confirmed that his defence is the main area of concern.
He added: “We are shipping goals a bit too easily.
"We will be looking to take on loan two or three players, a couple from England and one from abroad.
"We do need improvement - we need three to four players into the squad to give us solidness."