diff --git a/crates/fj-viewer/src/viewer.rs b/crates/fj-viewer/src/viewer.rs
index c1e6bd3b8..9e0475504 100644
--- a/crates/fj-viewer/src/viewer.rs
+++ b/crates/fj-viewer/src/viewer.rs
@@ -100,7 +100,10 @@ impl ViewerWindow {
 
     /// # Handle a cursor movement
     pub fn on_cursor_movement(&mut self, [x, y]: [f64; 2]) {
-        let [width, height] = self.window.size().as_f64();
+        let [width, height]: [f64; 2] = {
+            let size = self.window.size();
+            [size.width, size.height].map(Into::into)
+        };
         let aspect_ratio = width / height;
 
         // Cursor position in normalized coordinates (-1 to +1) with aspect
diff --git a/crates/fj-viewer/src/window.rs b/crates/fj-viewer/src/window.rs
index 05d346ee3..b3f9df366 100644
--- a/crates/fj-viewer/src/window.rs
+++ b/crates/fj-viewer/src/window.rs
@@ -47,9 +47,4 @@ impl WindowSize {
     pub fn is_valid(&self) -> bool {
         self.width > 0 && self.height > 0
     }
-
-    /// Convert size to `f64`
-    pub fn as_f64(&self) -> [f64; 2] {
-        [self.width, self.height].map(Into::into)
-    }
 }