diff --git a/src/circular.js b/src/circular.js
index fe4bfc3..675fecf 100644
--- a/src/circular.js
+++ b/src/circular.js
@@ -173,6 +173,10 @@ class Circular extends List {
     this.forEach(x => list.append(x));
     return list;
   }
+
+  toString() {
+    return this.join(',');
+  }
 }
 
 module.exports = Circular;