 He made his debut for the senior side in an August 1987 friendly match against Switzerland, and was a participant at the 1998 FIFA World Cup, where he was a reserve behind Michael Konsel.In total, Wohlfahrt earned 59 caps, his final international being in November 2001, a 2002 World Cup qualification match against Turkey, which Austria lost 0–5.He also has the unfortunate distinction of having netted nine goals in a single match, a 9–0 loss to Spain at Valencia's Mestalla Stadium on 27 March 1999.