Version tor-0.2.3.11 introduced a change in src/tools/tor-fw-helper/tor-fw-helper-natpmp.c. A quick diff with 0.2.3.10 shows: --- a/tor-fw-helper-natpmp.c 2011-12-15 11:27:07.000000000 -0500 +++ b/tor-fw-helper-natpmp.c 2012-01-21 22:07:30.000000000 -0500 @@ -87,7 +87,7 @@ /** Use select() to wait until we can read on fd. */ static int -wait_until_fd_readable(unsigned int fd, struct timeval *timeout) +wait_until_fd_readable(tor_socket_t fd, struct timeval *timeout) { int r; fd_set fds; Its pretty obvious that fd should be defined as an unsigned int. Reverting and everything compiles fine.