Brighton's second win in a week at their new Amex Stadium saw them through to the Carling Cup second round with a win over former landlords Gillingham.
An Ashley Barnes second-half penalty, awarded for a foul on Will Buckley, was the difference between the sides.
Before that Albion had made hard work of their stubborn League Two opponents.
Buckley and Barnes both put decent chances wide early on, and winger Craig Noone wasted a couple of decent chances before Barnes struck the decisive blow.
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Brighton manager Gus Poyet told BBC Sussex:
"I was pleased for a couple of reasons. Obviously we were not as good as last Saturday. But it's a cup game. You must think how much it means for them to come to this beautiful place.
"The goal was quite late, and as you can imagine it was even more tension on the pitch. But saying that, clean sheet, we won and we're in the draw. Nothing to complain about.
"The idea is to get experience, playing at the Amex, get used to the place, and win football games."