The only man convicted in the Air India bombing is planning to plead guilty to lying under oath, say his relatives.

Inderjit Singh Reyat has moved his court date up to next week and could face as much as 14 more years in jail, according to officials.

"Obviously we're happy about it," said Pervis Madon, who lost her husband in the bombing of Air India Flight 182, which killed 329 people off the coast of Ireland in 1985.

Reyat is already a controversial five-year sentence for providing bomb parts that were placed in a suitcase that exploded aboard the flight.

The perjury charge stems from his testimony in 2003 at the trial of two other men, Ripudamin Singh

Reyat was charged with perjury for allegedly lying during the trial of his alleged associates, Ripudamin Singh Malik and Ajaib Singh Bagri. Both men were acquitted of all charges in the bombing case.

At the time, Crown prosecutor Len Doust called Reyat a hostile witness who told "a pack of lies."

Reyat's trial will begin February 4. The maximum penalty for perjury is 14 years.