Donaldson faces race to be fit for Robins clash.
Donaldson who has put in some sterling performances over the hectic schedule and looks set to play through the pain barrier as the Railwaymen look to avoid relegation to League Two.
The former York City striker will receive a pain killling injection prior to kick off against Cheltenham Town.
Gudjon Thordarson told the official website "Clayton has done really well in the last few games, but he has got a crack in his little toe. He will be ok, we will give him an injection so that it will not hurt him so he will be ok to play."