The Denmark defender is back in training with Villa.
"He's working really hard to get back and it seems to be going really well," Vlaar told the Birmingham Mail.
"It will be great when he comes back because we need everybody. It's not been easy for him to come to Aston Villa and then to get such a big injury and to be out for almost all the season.
''You never know how long it can take. I know it took me longer to come back, so if he's back next month that will be great. Of course we all look forward to having him back."
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