Illinois Attorney General Lisa Madigan says the state has a “very strong argument” in favor of its public pension overhaul when the case is appealed to the Supreme Court.

A Sangamon County circuit judge struck down the law as unconstitutional on Friday. Madigan told reporters in Chicago on Monday that she plans an “immediate” appeal and a request that the court quickly take up the case. The law was written to reduce pension benefits to close a $100 billion state pension debt.

State employees successfully argued in local court that the state Constitution prohibits benefit reductions.