fstat() on epoll fd returns a value in st_mode which indicates that it is a regular file. Is this file type correct for an epoll fd?

I am trying to understand file type of an epoll fd returned from epoll_create() system call. When I call fstat() on epoll fd, the value returned in statbuf.st_mode indicates that the epoll fd represents a regular file. Is this a correct behavior?

Thank you in advance.