Goalkeeper Hamer has recovered from the ankle injury which has restricted him to just one appearance since November and will be challenging January signing Yohann Thuram-Ulien for his place between the posts.
Left-back Wiggins is also on the mend after suffering a hamstring injury against Wigan at the start of the month, but fellow defenders Chris Solly and Leon Cort will once again miss out due to long-term knee injuries.
The Addicks are in the bottom three having lost their last four matches and not picked up a point since New Year's Day.
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