32-year-old Jarvis, who will join the Saddlers until the end of the season, adds some much-needed experience to the team and will hopefully be able to provide some leadership as he and his new teammates look to start the New Year with a positive spell of form.
Middlesbrough-born Jarvis, who is not eligible to take on the Addicks this afternoon, will join up with former Canaries teammate Russell Martin, who recently joined the club on a deal until the end of the current campaign.
Speaking via the club's official website - Saddlers.co.uk - Dean said; "It’s a massive coup for the club. Matt is a fantastic player, someone who has Premier League quality and has done really well in the Championship.
"With Josh moving on, we identified this as a position to strengthen and Matt brings an immense amount of quality and experience. His quality will shine through in this division and we’re confident he will hit the ground running.
"He has fantastic ability and a very good end product. He also adds a little bit more experience to the squad having played in the top two divisions."