The High Court has ruled that the verdict of unlawful killing will be available to the jury in the Stardust Inquest.
48 people died following the nightclub fire in Artane in Dublin in 1981.
The Stardust's former manager Eamon Butterly brought the court challenge, arguing the verdict shouldn't be open to the jury.
Antoinette Keegan, who lost two sisters in the blaze, says it will allow fresh inquests into the deaths to now go ahead.