Macheda headed the only goal of the game in the 71st minute, his third strike in two games, as the Owls' winless start to the Sky Bet Championship season stretched to eight games.
Dickov said of the Italian loanee: "He comes alive in the box. He's got that horrible knack of being in the right place at the right time, which is what every team needs and every team wants.
"At the minute it's still just the month (his loan deal) but we're hopeful we can extend it. All the conversations that we had when he first came in were really positive."
Dickov, who saw his side win for the first time in seven matches, added: "In the first half I was really disappointed with the performance. I thought Wednesday were better than us with and without the ball, but we're going to get days like that.
"At half-time we changed the system around and in the second half we were a lot better. We kept the ball better and we were a threat on the break as well.
"I'm delighted with the three points more than anything else because we've been playing well recently and not getting the points we deserved, so to pick up three away from home, we're really happy."