diff --git a/src/unix/bsd/freebsdlike/mod.rs b/src/unix/bsd/freebsdlike/mod.rs
index 09ee413fdbb4f2c824a58964783d4bbecd156623..1d3c988908b82909f522ebb3b1f300225a9d49fa 100644
--- a/src/unix/bsd/freebsdlike/mod.rs
+++ b/src/unix/bsd/freebsdlike/mod.rs
@@ -669,6 +669,9 @@ pub const LOG_SECURITY: ::c_int = 13 << 3;
 pub const LOG_CONSOLE: ::c_int = 14 << 3;
 pub const LOG_NFACILITIES: ::c_int = 24;
 
+pub const TIOCGWINSZ: ::c_ulong = 0x40087468;
+pub const TIOCSWINSZ: ::c_ulong = 0x80087467;
+
 #[link(name = "util")]
 extern {
     pub fn getnameinfo(sa: *const ::sockaddr,