The international competitiveness of developing countries is integral to their economic development, hence understanding the main determinants of the real exchange rate is important. The empirical literature supports the Dutch disease hypothesis that foreign aid inflows significantly contribute to a real appreciation of African currencies, but these studies do not account for the downward pressure on the exchange rate from foreign currency payments. Using a panel of sub-Saharan African countries from 1980 to 2017, we test the hypothesis that the real exchange rate appreciation from aid inflows is moderated by interest repayments on external debt. Our findings suggest that one-third of the Dutch disease effect of aid inflows on the real exchange rate is offset by external debt interest repayments. These findings are important in showing that countries with external debt servicing obligations can mitigate the Dutch disease effect of aid inflows on competitiveness.