Aston Villa boss Roberto Di Matteo backed Pierluigi Gollini to recover from his howler after he gifted Huddersfield a point.
Michael Hefele secured a 1-1 draw when he scored with his first touch after Gollini's clearance hit him 30-yards out and flew into the net with just four minutes left.
It cancelled out Ross McCormack's first Villa strike but the hosts were made to pay after failing to turn their first-half dominance into goals.
Gollini joined Villa from Hellas Verona for £4million in the summer and Di Matteo believes his mistake can only help him improve.
"He is obviously disappointed but he is a young keeper who will have to learn from this," he said. "You learn from your mistakes, they are experiences, but he is a very strong character as well.
"He wanted to kick it away and kicked it onto the opposition. There's plenty of space, (James) Chester blocked the Huddersfield player off nicely so there was plenty of space. When the keeper make a mistake it's usually a goal but he made some great saves as well.
"But I thought we played a magnificent first half with a lot of intensity and energy on the pitch. We had some good opportunities to score the second goal and kill the game off a little bit. It's something we need to improve to be able to win games."
Mile Jedinak was at Villa Park to watch the game ahead of his proposed move from Crystal Palace with the midfielder expected to make the switch before the weekend.
"He wanted to come and watch the game," added Di Matteo, who also confirmed Joleon Lescott was primed to leave, with Rangers interested. "He's a player I like and he wanted to experience the atmosphere and watch the game and we'll see how it goes."
The point capped a superb few days for the Terriers after their 2-1 Sky Bet Championship win at Newcastle at the weekend and boss David Wagner was surprised with the nature of the goal from defender Hefele - who had been thrown up front and had only been on the pitch a minute.
"It was a strange moment, when I brought him on I didn't have the picture of this goal in my head," he said.
"At the end it was a typical Hef goal, he is a great character and has a fighting attitude. It's not easy for him at the moment because he has two strong competitors with (Mark) Hudson and (Christopher) Schindler but I'm very pleased for him."
Nahki Wells inspired Huddersfield's comeback when he came on after the break and the striker hit the post with a free-kick while he also forced Gollini into a smart stop.
Wagner added: "I explained to Nahki why I didn't give him a start because, after he missed such a big part of pre-season, he is not able to recover in three days after the 65 minutes he played against Newcastle.
"I said to him he could make the difference when he comes on to the pitch. With a bit more luck he could have scored three goals. He'll become fitter and fitter and he will be the Nahki Wells we had last season."