diff --git a/examples/layer-opacity.js b/examples/layer-opacity.js
index b172f5aca9..4d16c9874b 100644
--- a/examples/layer-opacity.js
+++ b/examples/layer-opacity.js
@@ -38,5 +38,5 @@ function update() {
   opacityOutput.innerText = opacity.toFixed(2);
 }
 opacityInput.addEventListener('input', update);
-
+opacityInput.addEventListener('change', update);
 update();