The Incan little mastiff bat (Mormopterus phrudus) is a species of bat in the family Molossidae, the free-tailed bats. It belongs to the subgenus Micronomus. This bat is endemic to Peru, where it is known only from one location, its type locality at Machu Picchu. It is considered a vulnerable species by the International Union for Conservation of Nature (IUCN) and an endangered species by the nation of Peru; though it is rare, it lives in a protected area.