diff --git a/src/terminal/sys/unix.rs b/src/terminal/sys/unix.rs
index e571d49..4f73564 100644
--- a/src/terminal/sys/unix.rs
+++ b/src/terminal/sys/unix.rs
@@ -33,7 +33,9 @@ pub(crate) fn size() -> Result<(u16, u16)> {
         ws_ypixel: 0,
     };
 
-    if let Ok(true) = wrap_with_result(unsafe { ioctl(STDOUT_FILENO, TIOCGWINSZ, &mut size) }) {
+    if let Ok(true) =
+        wrap_with_result(unsafe { ioctl(STDOUT_FILENO, TIOCGWINSZ.into(), &mut size) })
+    {
         Ok((size.ws_col, size.ws_row))
     } else {
         tput_size().ok_or_else(|| std::io::Error::last_os_error().into())