Matthew Bates is hopeful the injury suffered by skipper Andrew Davies will not keep him out of action long term.
But the manager has stopped short of putting a timeframe on the defender's recovery from a grade two tear of an ankle ligament.
Speaking ahead of this weekend's Dagenham trip, Bates said: "It is difficult. There is no operation so it is just a case of dealing with it.
"It is a grade two tear of one of the ligaments in his ankle. We have to wait and see how long that takes to repair.
"We will know more in a few weeks. We will know when he has been out on the training pitch, and how his body reacts to that.
"We hope it is not a long term one. We hope it is no longer than another month but the truth is we do not know at this stage."
Recovery, though, has been going well for the former Middlebrough, Bradford City and Ross County man.
"It's going good in the early stages - the swelling is going down nicely," he said.
"It is not fully down but he is off his crutches and out of his protective boot.
"It will be another couple of weeks before he gets out on the pitch to do some rehab."
The manager has no new injury concerns ahead of the trip to East London.
On his squad, Bates said: "We have nothing new. Everything is fine."