Although Nigel Clough is actively working on recruiting at least one player before the weekend, the Blades boss has sanctioned a loan switch for midfielder Florent Cuvelier.
The 21-year-old will spend the rest of the season with League One rivals Port Vale.
Cuvelier, who didn't figure at Notts County last weekend, has featured just twice from the bench under Nigel Clough, both outings coming in 3-1 home victories over Crewe Alexandra and Tranmere Rovers respectively.
In total, Cuvelier, signed from Stoke City in the last transfer window, has made eight appearances for the Blades.
The Belgian could make his Vale debut against Oldham Athletic a Vale Park on Saturday.