1 files changed, 1 insertions, 1 deletions
diff --git a/src/tools/tor-fw-helper/tor-fw-helper-natpmp.c b/src/tools/tor-fw-helper/tor-fw-helper-natpmp.c
index a8cdbbf24..aaa685e1e 100644
--- a/src/tools/tor-fw-helper/tor-fw-helper-natpmp.c
+++ b/src/tools/tor-fw-helper/tor-fw-helper-natpmp.c
@@ -84,7 +84,7 @@ tor_natpmp_cleanup(tor_fw_options_t *tor_fw_options, void *backend_state)
 
 /** Use select() to wait until we can read on fd. */
 static int
-wait_until_fd_readable(int fd, struct timeval *timeout)
+wait_until_fd_readable(unsigned int fd, struct timeval *timeout)
 {
   int r;
   fd_set fds;