Michel Kuipers has been cleared to keep goal for Albion against Derby at Withdean on Saturday following a U-turn by referee Brian Curson.
Kuipers' late red card in Seagulls' last home game against Bradford has been reduced to a yellow after Curson studied video evidence.
Kuipers was sent off in the closing stages of Albion's 3-2 victory at Withdean on November 2 for fouling Stephen Warnock and conceding a penalty.
A local ref advised the Seagulls to appeal and Curson has now changed his mind after reviewing the incident.
It means Kuipers' automatic one-match suspension is rescinded, so he is available to continue the stunning form he showed in Monday's 1-1 draw at Wolves.
Kuipers said: "I am delighted, it's really good news. The referee looked at the tape and has agreed he made a mistake."
Meanwhile, Albion boss Steve Coppell believes his squad strengthening could be over.
He does not expect any more money to be made available by chairman Dick Knight and the Board unless there are exceptional circumstances.
Coppell has introduced six new players in cut price deals since taking charge on October 8.
Dean Blackwell and Simon Rodger have been signed on monthly contracts and Andy Petterson re-signed on the same basis.
Steve Sidwell is on loan from Arsenal for a month and Daniel Webb is back on loan with the Seagulls from Southend for the same period.
Coppell has also given a month's trial to Cameroon-born teenager Roger Pandong.
"When I came in I was told there was something, but not a great deal," said Coppell. "Dick said we will help as much as we can. I cannot see more being available to get much more in unless it's an emergency."
Former Wimbledon centre half Blackwell had a scan yesterday afternoon on a hamstring injury sustained in Monday's 1-1 draw at Wolves.
Coppell's biggest concern for Saturday's home sell-out against Derby is a possible striker shortage, with Bobby Zamora and Graham Barrett both battling to be fit.
It's not just ankle and Achilles injuries that are bothering Zamora. "Bobby's had a long-standing back problem, so he sees an osteopath on a regular basis," Coppell revealed.
Barrett has been under treatment at his parent club Arsenal for the knee injury which forced him off at Wolves.
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