diff --git a/src/lib.rs b/src/lib.rs
index 5d42374..5f89bc7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -213,9 +213,10 @@ fn render_preview(state: &State) -> DynamicImage {
         // todo get rid of magic numbers! what about Bitsy HD?
         buffer = image::ImageBuffer::from_fn(128, 128, |x, y| -> image::Rgba<u8> {
             let p = indices.get_pixel(x, y);
+
             colour_map
                 .lookup(p.0[0] as usize)
-                .expect("indexed color out-of-range")
+                .expect("indexed colour out-of-range")
                 .into()
         });
     }