Jabo Ibehre looked to have put Orient on course for maximum points by heading in a lovely cross from Jason Demetriou 10 minutes from time.

But skipper Forster hauled Brighton level with his first goal in 14 games after Adam Chambers had been penalised penalised for handball.

The Seagulls had nearly came unstuck for missing a hatful of chances.

Brighton: Kuipers, Whing, El-Abd, Richards, Thomson, Fraser (Dixon 84), Elphick, Cox (Martot 76), Murray, Bowditch (Robinson 67), Forster.
Subs Not Used: Lynch, Hart.

Goals: Forster 90 pen.

Leyton Orient: Morris, Purches, Saah, Chambers, Demetriou, Oji (Thelwell 73), Terry, Palmer, Thornton (Barcham 75), Ibehre, Gray (Boyd 71).
Subs Not Used: Nelson, Daniels.

Booked: Morris.

Goals: Ibehre 80.

Att: 6,242

Ref: Paul Melin (Surrey).