diff --git a/src/codecs/avif/yuv.rs b/src/codecs/avif/yuv.rs
index e0c70174e6..29167342a4 100644
--- a/src/codecs/avif/yuv.rs
+++ b/src/codecs/avif/yuv.rs
@@ -528,7 +528,7 @@ fn process_halved_chroma_row<
     // preventing accidental use of invalid values from the trailing region.
 
     let y_plane = &image.y_plane[0..image.width];
-    let chroma_size = (image.width + 1) / 2;
+    let chroma_size = image.width.div_ceil(2);
     let u_plane = &image.u_plane[0..chroma_size];
     let v_plane = &image.v_plane[0..chroma_size];
     let rgba = &mut rgba[0..image.width * CHANNELS];