diff --git a/src/lib.rs b/src/lib.rs
index 9b4d510..9157e97 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -92,7 +92,7 @@ impl Screen {
     fn metamode(&self, map: &ScreenMapping) -> Result<String, CommandError> {
         let Resolution { width, height } = self.resolution;
         let Offset { x, y } = self.offset;
-        let (in_w, in_h) = match self.orientation {
+        let (_in_w, _in_h) = match self.orientation {
             Orientation::None | Orientation::Invert => (width, height),
             Orientation::Right | Orientation::Left => (height, width),
         };