The club had expressed their frustration on Thursday at the time it was taking for the Spanish defender's paperwork to go through but the left-back is now clear to take on the Millers and, given Dougie Freedman's disappointment with his side's defensive display against Walsall, could make the starting XI.
Familiar faces will be on show for the visitors with Matt Derbyshire and Danny Collins set to line up for Rotherham.
Head-to-Head: Reds v Millers