diff --git a/benchmark/dom.js b/benchmark/dom.js
index 1bc6075..5e08e59 100644
--- a/benchmark/dom.js
+++ b/benchmark/dom.js
@@ -144,7 +144,7 @@ Node.prototype = {
     return retval;
   },
 
-  set innerHTML() {
+  set innerHTML(_) {
     while (this.firstChild) {
       this.removeChild(this.firstChild);
     }