diff --git a/README.md b/README.md
index cc5eb62..d71cd1e 100644
--- a/README.md
+++ b/README.md
@@ -12,10 +12,10 @@ fn max_char(chars: &str) -> (char, usize)
 {
     let mut map = Map::new();
     for x in chars.chars() {
-	*map.entry(x).or_insert(0usize) += 1;	
+		*map.entry(x).or_insert(0usize) += 1;	
     }
 
-    map.into_iter().max_by_key(|(k, v)| v).unwrap_or_default()
+	map.into_iter().max_by_key(|&(_, v)| v).unwrap_or_default()
 }
 ```