The 22-year-old goes straight into the squad for Saturday’s Emirates FA Cup third round clash with Bradford City at Huish Park having signed on the dotted line.
Becoming a Glover for the rest of the 2017/18 season, Wing arrives in Somerset with a goal scoring reputation.
The attacking midfielder netted just shy of 60 goals in two seasons at Shildon, leading to Boro snapping him up for their Under-23s.
Fresh from a 30-goal season in Northern League Division One, the exciting prospect impressed at the Riverside to earn himself a new deal until 2019.
Wing made his Middlesbrough debut in the 3-0 Carabao Cup win over Scunthorpe United before playing a key role in the third round win over Aston Villa.