Ruslan Magomedov recently pulled out of his UFC 204 bout against Stefan Struve due to illness and stepping up to meet Struve on short notice will be Daniel Omielanczuk.
The fight change was made official by the UFC on Thursday morning.
UFC 204 will come from the Manchester Arena on October 8 and will be headlined by a rematch as Michael Bisping defends the UFC middleweight title against Dan Henderson.
Omielanczuk (19-5-1, 1NC) has won three in a row after dropping back to back fights and is coming off a majority decision win against Alexey Oleynik at UFC Fight Night 91 in July. Struve (27-8) is coming off a knockout win at UFC Fight Night 87 against Antonio Silva and he is 2-1 in his last three fights.
The current UFC 204: Bisping vs. Henderson II fight card is below.
Michael Bisping (30-7) vs. Dan Henderson (32-14)
Vitor Belfort (25-12) vs. Gegard Mousasi (39-6)
Ovince Saint Preux (19-8) vs. Jimi Manuwa (15-2)
Stefan Struve (27-8) vs. Daniel Omielanczuk (19-5-1, 1NC)
Adriano Martins (28-7) vs. Leonardo Santos (15-4)
Brad Pickett (26-11) vs. Iuri Alcantara (37-7, 1NC)
Davey Grant (10-2) vs. Damian Stasiak (10-2)
Leon Edwards (11-3) vs. Albert Tumenov (17-3)
Ian Entwistle (9-3) vs. Rob Font (12-2)
Arnold Allen (11-1) vs. Mirsad Bektic (10-0)
Danny Roberts (13-1) vs. Mike Perry (8-0)
Reza Madadi (14-4) vs. Marc Diakiese (9-0)