diff --git a/src/utility/list.rs b/src/utility/list.rs
index 024606c..f6efb50 100644
--- a/src/utility/list.rs
+++ b/src/utility/list.rs
@@ -6,6 +6,7 @@ pub struct List<T: PartialEq> {
 
 type Link<T> = Option<Box<Node<T>>>;
 
+#[derive(PartialEq)]
 struct Node<T> {
     elem: T,
     next: Link<T>,