Not even the powers of the invisi-cloak could save Rupert Grint from catching the dreaded swine flu.

The Harry Potter star who plays Harry’s best friend Ron Weasley in the film series is recovering from a mild case of the illness, according to BBC.

The wizard-in-training’s publicist told the network that the actor has returned to work on the set of Harry Potter and the Deathly Hallows—the film based on the last book in JK Rowling’s popular fantasy series.

Grint’s doctor confirmed that the 20-year-old thesp was no longer contagious. The Hogwart’s School of Witchcraft and Wizardry is back in session.