Arnason is away with Iceland until Sunday meaning he will also miss the weekend trip to Port Vale.
Johnny Mullins is likely to be given a game to help his road back to full fitness with a few other team changes expected for Tuesdays Johnstones Paint trophy clash (7.30pm).
Boss Steve Evans also hopes to tie up the proposed deal of a defender that watched Saturdays win over Bradford City, and he could be in line for an immediate debut.
Source: FOOTYMAD
