Latvia international Vitalijs Maksimenko has joined from Brighton, along with Charlton striker Jordan Cook.
The versatile Maksimenko, who can play anywhere down the left flank, moved to the Amex from Skonto Riga in the January transfer window, while Cook had made nine Addicks appearances this season before heading to Huish Park.
The pair, who will stay with the Glovers until April 17, are both available to be involved against the Robins.
Part of the thinking behind Gary Johnson's double signing is that captain Jamie McAllister and Byron Webster are both on nine yellow cards and should they pick up cautions against Swindon they would miss the next two games.
McAllister (foot) and Sam Foley (hip) are both likely to be involved.
The visitors will be without midfielder Alan Navarro.
The former Brighton man, 31, was an unused substitute in the 2-1 defeat to Brentford but a hamstring injury will sideline him against their fellow promotion hopefuls.
Nathan Thompson shrugged off a knock to his knee to play for 90 minutes while Tommy Miller also started despite having also picked up a knock.
Youth team players Connor Waldon and Alex Ferguson have been named in the squad as Kevin MacDonald's men look to close the four-point gap on the automatic promotion places against a side level on points with the Robins.
Meanwhile, defender Troy Archibald-Henville has made a return to light training having been ruled out since early November with a knee injury.
- Sports & Recreation