diff --git a/examples/index.html b/examples/index.html
index 408a30f316e039..4be8877065e5f9 100644
--- a/examples/index.html
+++ b/examples/index.html
@@ -38,7 +38,7 @@ <h1><a href="https://threejs.org">three.js</a></h1>
 
 		</div>
 
-		<iframe id="viewer" name="viewer" allowfullscreen allowvr onmousewheel=""></iframe>
+		<iframe id="viewer" name="viewer" allowfullscreen allowvr></iframe>
 
 		<a id="button" target="_blank"><img src="../files/ic_code_black_24dp.svg"></a>