Australia's Claire Polosak will become the first woman to officiate in a men's ODI when Namibia play Oman in the final of the World Cricket League Division 2 in Windhoek on Saturday.
The 31-year-old never played cricket but blazed a trail in 2017 when she became the first woman to stand in a men's top-level match when New South Wales played a Cricket Australia XI in a one-day match in Sydney.
"I am thrilled to be the first woman to stand in a men's ODI and how far I have come as an umpire," Polosak said.
"It really is important to promote women umpires and there's no reason why females can't umpire in cricket. It's about breaking down barriers, creating awareness so more females can come into the role."
Polosak has officiated in 15 women's ODIs, the first one in November 2016 between Australia and South Africa, and has also taken field in the semi-final of the ICC Women's T20 World Cup 2018 between England and India and four matches at the ICC Women's World Cup 2017.
Namibia and Oman both secured ODI status after finishing in the top two positions of the table in the ICC World Cricket League Division 2.