Economics - alpha and capital deepening

A country with a lower alpha will have a lower benefit from further capital deepening. This is a statement from the CFA course, but I don’t understand why it is the case. Wouldn’t a country with lower alpha (a.k.a less of the output going to capital) actually benefit more from capital deepening? Because the country with a lower alpha would see a higher percentage increase in the capital-to-labour ratio than a country which already has a high capital-to-labour ratio?