diff --git a/docs/examples/125_red_test.html b/docs/examples/125_red_test.html
index e430f36..6e9a89b 100644
--- a/docs/examples/125_red_test.html
+++ b/docs/examples/125_red_test.html
@@ -87,7 +87,7 @@
     <script>
     const modelViewer = document.querySelector("model-viewer");
     modelViewer.addEventListener("load", (event) => {
-      const material = modelViewerParameters.model.materials[0];
+      const material = modelViewer.model.materials[0];
       material.pbrMetallicRoughness.setBaseColorFactor([1, 0, 0, 0.1]);
     });
     </script>