diff --git a/examples/js/loaders/GLTFLoader.js b/examples/js/loaders/GLTFLoader.js
index c3ef74a068bda83bdb8258f83923728417d1c4ca..0d5516c42110f88508f124ac79d1b46bc8dfb49f 100644
--- a/examples/js/loaders/GLTFLoader.js
+++ b/examples/js/loaders/GLTFLoader.js
@@ -2240,9 +2240,10 @@ THREE.GLTFLoader = ( function () {
 
 			}
 
-			// emissiveTexture and baseColorTexture use sRGB encoding.
+			// baseColorTexture, emissiveTexture, and specularGlossinessTexture use sRGB encoding.
 			if ( material.map ) material.map.encoding = THREE.sRGBEncoding;
 			if ( material.emissiveMap ) material.emissiveMap.encoding = THREE.sRGBEncoding;
+			if ( material.specularMap ) material.specularMap.encoding = THREE.sRGBEncoding;
 
 			if ( materialDef.extras ) material.userData = materialDef.extras;