Back-row forward Blair Cowan has been added to Scotland's World Cup squad as an injury replacement.
The London Irish forward has been called up after Scotland lost lock Grant Gilchrist to injury on Monday.
The SRU announced the move on their official Twitter account, saying: "BREAKING: Back-row @Blair--CowanTC added to @Scotlandteam squad as injury replacement. Welcome aboard Blair!"
New Zealand-born Cowan started all of Scotland's games during the last 6 Nations campaign, and was a surprise omission from the squad.
And the 29-year-old's place in coach Vern Cotter's World Cup squad was taken by fellow 'Kiwi-kilt' John Hardie.
Although Hardie played in the opening game against Japan, in which he scored a try, he was ruled out of the second match against USA because of a head injury.
However, Cowan has been given the call because of a groin injury to Gilchrist.
Gilchrist was ruled out of the rest of the competition after lasting just 18 minutes of Sunday's win over USA at Elland Road.
Scotland are sitting top of Group B, having won both of their opening World Cup matches and will play South Africa at St James' Park on Saturday.
Cowan insists he is ready to go straight into action if called upon when the Scots take on the Springboks in Newcastle with a quarter-final slot in reach.
He said: "The (coaches) know what I can do. I don't need to prove myself. I just want to come up here and be positive. Even if it's just in training, I'll just bring some energy.
"And if I'm called up to play on Saturday am I ready? Yeah - just show me the jersey."
Cowan, who qualifies for Scotland thanks to his Glasgow-born mother, feared his World Cup dream was over after missing Cotter's first cut.
"It was devastating," he said. "We all knew how close the seven role was. It was probably the tightest position in the whole squad.
"I was hugely aware (that being dropped) was a big possibility because of the performances the other boys were putting out there.
"But I've been through it all before. My career hasn't been the smoothest - it's been a bit of a roller-coaster ride so know there are peaks and troughs you can go through.
"I just had to stay on my toes. There are some tight turnarounds at the World Cup so it's inevitable that injuries would happen. Just look at Wales, they've had it tough.
"So to get the call-up is sensational. It's every man's dream. It's just a shame it comes on the back of someone hurting themselves.
"I just saw the boys when I arrived and I was kind of caught off-guard by how stoked I was to see them. I was quite emotional. I'm just excited to be part of a World Cup now."