diff --git a/src/lib.rs b/src/lib.rs
index 52a8d90b7b..bef973455b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -96,14 +96,14 @@ pub fn spawn_shell<T: Default>(user: &User<T>) -> IoResult<i32> {
     unsafe {
         let mut t: libc::termios = core::mem::zeroed();
         if libc::tcgetattr(0, &mut t) == 0 {
-            t.c_iflag |= (libc::ICRNL | libc::IXON) as _;
-            t.c_oflag |= (libc::OPOST | libc::ONLCR) as _;
+            t.c_iflag |= (libc::ICRNL | libc::IXON) as libc::tcflag_t;
+            t.c_oflag |= (libc::OPOST | libc::ONLCR) as libc::tcflag_t;
             t.c_lflag |= (libc::ICANON
                 | libc::ECHO
                 | libc::ECHOE
                 | libc::ECHOK
                 | libc::ISIG
-                | libc::IEXTEN) as _;
+                | libc::IEXTEN) as libc::tcflag_t;
             t.c_cc[libc::VMIN] = 1;
             t.c_cc[libc::VTIME] = 0;
             let _ = libc::tcsetattr(0, libc::TCSANOW, &t);