diff --git a/src/class.rs b/src/class.rs
index 0ca34a4..9ff3b7b 100644
--- a/src/class.rs
+++ b/src/class.rs
@@ -27,7 +27,7 @@ impl Class {
         superclass: Option<Class>,
         methods: HashMap<String, Function>,
     ) -> Self {
-        let superclass = superclass.map(|x| Box::new(x));
+        let superclass = superclass.map(Box::new);
 
         Self {
             name,