Boss Steve Evans explained about the wingers blow yesterday.
He told themillers.co.uk: "Lionel he has dislocated his shoulder and will now have an operation which will in turn see the wee man missing for three months.
"This is a loss for us as we were just starting to see the best of him but these things happen and are sent to test our resolve."
Evans will look to dip into the loan market once again to provide competition for places on the right in Ainsworths absence.