Statistics show that remittances inflow to Nigeria grew from US$3,000,000 in 1978 to over US$22 billion in 2017. Theoretically, such a large inflow of foreign currency into an economy may lead to Dutch diseases. This study, therefore, investigated whether the massive inflow of remittances into the economy causes Dutch disease. Given that the model had both I(0) and I(1) variables, ARDL/Bound testing methodology was used with annual data from 1981 to 2016. The ARDL result showed that migrant remittances have a significant positive effect on the real effective exchange rate in Nigeria in the long run. Specifically, a one per cent increase in the inflows of remittances increases the real effective exchange rate of Naira by 0.44 per cent in the long run. This appreciation of the Nigerian Naira relative to other competing nations encourages import and discourages export, leading to the Dutch disease effect.