1 files changed, 1 insertions, 1 deletions
diff --git a/src/2021/20/mod.rs b/src/2021/20/mod.rs
index e3c3287..292a2b2 100644
--- a/src/2021/20/mod.rs
+++ b/src/2021/20/mod.rs
@@ -43,7 +43,7 @@ impl Image {
                 });
                 let mut idx = 0;
                 for neighbor in neighbors {
-                    idx = idx * 2 + if neighbor { 1 } else { 0 };
+                    idx = idx * 2 + usize::from(neighbor);
                 }
                 new_map[Row(row)][Col(col)] = self.algorithm[idx]
             }