David Button took some pleasure from denying former Brentford team mate John Swift from the penalty spot but Roy Beerens' follow up made it meaningless.
The Fulham stopper brilliantly denied the Reading midfielder's spot kick but the Royals were first to the ball to score from the rebound.
Incredibly, it was the fifth time the Berkshire side have scored in that manner this season and left Button and his Fulham team-mates frustrated.
“I know Swifty from Brentford so it was nice to stop him but as they scored from the rebound it's a bit meaningless,” Button said.
“It was very frustrating. You do what you can to keep it out but sadly it fell to them. These things are frustrating.
“They've had a similar problem to us as they've changed their takers a lot. They're alive to the rebounds. I spoke to Ali Al Habsi after the game and he was saying they've scored a lot of rebounds.
Fulham have their own problems from 12 yards, missing seven penalties this season and Chris Martin has seen his last two saved.
The Whites have been practising penalties on the training ground, allowing Button to gain confidence at saving them, but the goalkeeper is not putting his hand up to take one himself.
“I don't know if the gaffer will allow me to take one,” Button joked. “We've got enough quality players who are probably better finishers than me.
“We need to overcome those barriers. We've practiced penalties all week so I'm used to them (from a goalkeeper's perspective). It's different on a game day so it's a difficult one.”
Keep up to date with the latest news in west London via the free getwestlondon app. You can even set it to receive push notifications for all the breaking news in your area.