diff --git a/codex-rs/utils/pty/src/pipe.rs b/codex-rs/utils/pty/src/pipe.rs
index 037b3e5c66..7e5c47b6f6 100644
--- a/codex-rs/utils/pty/src/pipe.rs
+++ b/codex-rs/utils/pty/src/pipe.rs
@@ -103,7 +103,7 @@ async fn spawn_process_with_stdin_mode(
     env: &HashMap<String, String>,
     arg0: &Option<String>,
     stdin_mode: PipeStdinMode,
-    detach_from_tty: bool,
+    #[cfg_attr(not(unix), allow(unused_variables))] detach_from_tty: bool,
 ) -> Result<SpawnedProcess> {
     if program.is_empty() {
         anyhow::bail!("missing program for pipe spawn");