He joined on a season long loan last summer, but was injured back in October and hasn't played since.
However Swindon had already agreed to have first refusal on signing him, and now Sturrock has confirmed that will be taking up that option.
"Peter continues his recovery and hopefully he will be back training with the first team before the end of the season, but we don't want to put him at any risk of a recurrence of the injury by forcing him into competitive action too early. He will be a Swindon player next season so there will be plenty more to come from him I'm sure."