De Bock, who played European football for Brugge including two legs of a Champions League qualifier against Manchester United in 2015, has signed a four-and-a-half year contract that promises to keep him at Elland Road until the summer of 2022.
Prior to joining Brugge in 2013, De Bock began his professional career at Lokeren, winning a Belgian Cup in 2012. He later won a second cup with Brugge in 2015, while also picking a league title in 2016.
De Bock has never been capped at senior international level, but he has previously represented Belgium at various junior age groups from Under-16 level through to Under-21.
He has actually been called up to the full squad on more than occasion but remained unused.
You may also be interested in 'FanView: Leeds Finally Have an Owner Who Can Guide Them Back to the Big Time After Years of Turmoil'