The Swedish striker scored Manchester United’s opener in Sunday’s win over Aston Villa. The 35-year-old signed from Helsingborg on a three-month loan deal.
Ferguson said: “Henrik is here until 12 March, we are not looking beyond that.
“It’s not pertinent at the moment. It wouldn’t be fair to put Helsingborg under that type of pressure.”
He added: “Henrik is enjoying playing here and that is the way we are going to leave it.
“Henrik’s first game was excellent for us. It gave us an insight into the type of player he is, he can be a fantastic asset to us.
“He may not play all the games but the important thing at his age and with his experience is he will understand that.
“He has an important role and we will use him when he is fresh.”