Charlton have secured the services of veteran Scottish defender Christian Dailly after he impressed on trial.
The 35-year-old was released by Rangers at the end of last season.
Parkinson told the club website: "We're delighted we've agreed a deal for Christian to join us. He's a very good professional, very fit for his age.
"He'll be a good influence around the training ground. It's so important to have good role models in your football club and Christian gives us that."
Parkinson has been a frustrated bystander this summer, having to watch a host of players leave the club while they await a new takeover.
Until Dailly's signing the Addicks had only signed two new players, Miguel Angel Llera from MK Dons and ex-Leeds defender Frazer Richardson.
Parkinson told BBC London 94.9: "We've got a lot of holes in our squad and I don't want our supporters to think we don't realise that.
"But we are in a very tricky situation and I can't really say too much more than that.
"It's been a difficult summer and I'm sure one day myself and the chairman can explain to people what's been going on."
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