The plaque on the the Otago Peninsula Soldiers' Memorial, on Arthurs Seat, was originally dedicated in 1923 but had some errors including misspelt names and incorrect ranks.
Historian and author Ron Palenski noticed the errors and wrote about his findings in the Otago Daily Times (April 20, 2013).
Since then, the Rotary Club of Dunedin South has ''adopted'' the memorial and, along with a $5700 grant from the Lotteries Commission, has helped pay for a new plaque.
Club president Ginny Green said the new plaque would be rededicated today at 2pm and all family members were encouraged to attend.
The old plaque would be kept at Toitu Otago Settlers Museum.
Mr Palenski said it was important for a memorial plaque to be accurate.
''You can't blame the people who did it in the early 1920s who were working from pretty scant information. We are lucky 100 years on that we have much greater information.''
Relatives of those on the plaque who wanted to attend this weekend's ceremony but were unable to negotiate the steep walk to the site can ring Norman Firth 021 222-7097 for transport.