diff --git a/examples/js/loaders/GLTF2Loader.js b/examples/js/loaders/GLTF2Loader.js
index ac10505b147d546a074f3a3721f72d702844cdc6..b3a4d6568cf35bfd9e58e54a8cb19ab4aad7e9ce 100644
--- a/examples/js/loaders/GLTF2Loader.js
+++ b/examples/js/loaders/GLTF2Loader.js
@@ -2196,6 +2196,12 @@ THREE.GLTF2Loader = ( function () {
 
 						}
 
+						if ( geometry.attributes.normal === undefined ) {
+
+							material.shading = THREE.FlatShading;
+
+						}
+
 						meshNode = new THREE.Mesh( geometry, material );
 						meshNode.castShadow = true;