Holt failed to test the West Ham defence, scuffing wide his best chance in the first half when the ball fell to him in the penalty area.
Hughton maintains the 31-year-old has lost none of his hunger, having agreed a new deal after handing in a shock transfer request at the end of the season which saw him become a summer target for West Ham.
"I have seen the same desire in him that he has always shown here," said Hughton.
"The fact he has not scored will be a disappointment for him, because he is a striker, and will work even harder to make it right.
"What we want from every player is to be showing their best.
"Strikers want to score and that is what Grant has done here over the past few seasons. I am sure that will be the case again."
Hughton added: "He has been very focused on the games and in training, and I am quite sure with somebody of Grant's qualities, if he keeps getting in the right positions and we can keep creating chances, then it wont be long until he scores."