A federal judge on Tuesday denied a last-minute bid by longtime Trump ally Roger Stone to postpone sentencing in his campaign-finance case.

Judge Amy Berman Jackson said she would issue a sentencing date on March 1. She also said she would issue her formal order on future sentences for Stone, who was convicted of lying to Congress and obstructing congressional investigations in October and is cooperating with special counsel Robert Mueller’s Russia investigation.

A spokesman for Stone, who has said he would be served in prison, said the former Trump adviser would continue to fight to get a sentence that wasn’t too harsh.

“The judge has permitted us to have private conversations with the government about corrections issues," Stone’s spokesman said in a statement. "We look forward to working with the government to resolve these issues on March 1, and look forward to accepting the appropriate sentencing date from the judge on March 1st.”

Jackson had said Friday that Stone would likely serve about six months in prison, raising the prospect of an unusual jail term for a defendant who has cooperated with investigators and asked that he be spared a hard sentence.

The Justice Department set a sentencing guidelines range for the case of up to 10 months in prison, and prosecutors have asked Jackson to accept that. Prosecutors have emphasized the low number of lies Stone acknowledged in his testimony, and the fact that he helped Mueller’s team to jail a second associate of President Trump for lying to investigators.

Stone faces a maximum of five years in prison for his convictions.