NAT Fraser has had four months added to the 17 year sentence he is currently serving for the murder of his wife.
Fraser (54), from Elgin, has admitted being in possession of a mobile phone in prison.
The former fruit and veg businessman appeared at Livingston Sheriff Court.
Fraser has twice been convicted of plotting the murder of his wife Arlene and lost his latest appeal earlier this year.
Arlene (33), disappeared on April 28, 1998 and her body has never been found.
Fraser was first convicted in 2003 of hiring a hitman to murder her and sentenced to 25 years in prison.
That conviction was subsequently overturned after an appeal to the UK Supreme Court, but Fraser was again found guilty following a fresh trial at the High Court in Edinburgh. He was sentenced to 17 years, reflecting the period still outstanding from his original sentence.