An error on the stroke of half-time means Orient trail Yeovil at Huish Park.
Keeper Jamie Jones dropped an Andrew Williams cross into the path of Luke Freeman who rolled the ball into an empty net.
The visitors had got themselves back in the game through Alex Revell only five minutes earlier, the striker heading home a Dean Cox cross at the near post.
Yeovil had taken the lead on 11 minutes through Dean Bowditch, his curling effort going in off the post.
Yeovil had started the better, but the O's finished the half the stronger, only for Jones to gift the hosts the lead once more.
Log on at full-time for a full match report.
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