Alison Corfield says she is delighted by the parish council's decision to correct her great uncle's memorial name.
Mrs. Corfield, from Shrewsbury, says her family had tried to hide the extra "s" by covering it with mud.
She wrote to councillors arguing that a change would be appropriate as the 100th anniversary of the start of hostilities approached.
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Despite receiving treatment at the scene, the man was pronounced dead shortly after.
Cloud will largely clear this evening, although with variable cover and few light showers over the Derbyshire hills.
The rain will clear during the evening so the rest of the night will be dry and mild with long clear periods.