diff --git a/vm/src/stdlib/os.rs b/vm/src/stdlib/os.rs
index bb8bdec660..4d20fa5c84 100644
--- a/vm/src/stdlib/os.rs
+++ b/vm/src/stdlib/os.rs
@@ -8,7 +8,7 @@ use std::{env, fs};
 
 #[cfg(unix)]
 use nix::errno::Errno;
-#[cfg(unix)]
+#[cfg(all(unix, not(target_os = "redox")))]
 use nix::pty::openpty;
 #[cfg(unix)]
 use nix::unistd::{self, Gid, Pid, Uid};
@@ -853,7 +853,7 @@ fn os_seteuid(euid: PyIntRef, vm: &VirtualMachine) -> PyResult<()> {
     unistd::seteuid(Uid::from_raw(euid)).map_err(|err| convert_nix_error(vm, err))
 }
 
-#[cfg(unix)]
+#[cfg(all(unix, not(target_os = "redox")))]
 pub fn os_openpty(vm: &VirtualMachine) -> PyResult {
     match openpty(None, None) {
         Ok(r) => Ok(vm