diff --git a/examples/js/loaders/GLTFLoader.js b/examples/js/loaders/GLTFLoader.js
index 511cbf05e44cd2..2e53bb3dea04fd 100644
--- a/examples/js/loaders/GLTFLoader.js
+++ b/examples/js/loaders/GLTFLoader.js
@@ -1080,7 +1080,7 @@ GLTFParser.prototype.loadMaterials = function() {
 
 									}
 
-									if ( value ) {
+									if ( value !== undefined ) {
 
 										uvalue = value;