Schalke have agreed a deal to sign Timo Hildebrand on a contract until the end of the season subject to the goalkeeper passing a medical.
The Bundesliga club have moved to bring in the former Germany international after losing Ralf Fahrmann to a knee injury.
Coach Huub Stevens had been left with just Lars Unnerstall and Mathias Schober at his disposal after No.1 Fahrmann was ruled out for three months.
Hildebrand has been training with second division side Eintracht Frankfurt in recent weeks since being released by Sporting in the summer, while he also had a trial at Manchester City in pre-season.
The 32-year-old last appeared in the Bundesliga for Hoffenheim last year, but they chose not to extend his contract in May 2010.