diff --git a/src/terminal/sys/unix.rs b/src/terminal/sys/unix.rs
index 9e50e53..13b56bd 100644
--- a/src/terminal/sys/unix.rs
+++ b/src/terminal/sys/unix.rs
@@ -32,8 +32,9 @@ pub(crate) fn size() -> Result<(u16, u16)> {
         ws_ypixel: 0,
     };
 
-    let fd = if let Ok(file) = File::open("/dev/tty") {
-        FileDesc::new(file.into_raw_fd(), true).raw_fd()
+    let file = File::open("/dev/tty").map(|file| (FileDesc::new(file.into_raw_fd(), true)));
+    let fd = if let Ok(file) = &file {
+        file.raw_fd()
     } else {
         // Fallback to libc::STDOUT_FILENO if /dev/tty is missing
         STDOUT_FILENO