The JTA reported that the German Federal High Court has upheld Ernst Zundel's five-year prison sentence.
On Sept. 12, the court rejected a 600-page proposed revision in the sentence, according to German news reports.
After a yearlong trial Zundel, one of the world's most active Holocaust deniers, was sentenced Feb. 15 by the Mannheim district court on charges of denying the Holocaust on his Canada and U.S.-based Internet site.
In justifying the sentence, the presiding judge, Ulrich Meinerzhagen, had described Zundel as an "extreme anti-Semite" and "committed National Socialist" who sought to glamorize Hitler and make him seem harmless.
Zundel, a German native, was arrested in Canada in February 2003 and deported to Germany two years later. Reportedly he is one of the first right-wing extremists to use the Internet to spread hate material worldwide.