diff --git a/src/materials/MeshPhongMaterial.js b/src/materials/MeshPhongMaterial.js
index 594ddab2be2aaaba26c34926126e6561b0be05f0..efb3474f74b58ae61a76112e1be340581cc2ff53 100644
--- a/src/materials/MeshPhongMaterial.js
+++ b/src/materials/MeshPhongMaterial.js
@@ -112,59 +112,64 @@ THREE.MeshPhongMaterial = function ( parameters ) {
 THREE.MeshPhongMaterial.prototype = Object.create( THREE.Material.prototype );
 THREE.MeshPhongMaterial.prototype.constructor = THREE.MeshPhongMaterial;
 
-THREE.MeshPhongMaterial.prototype.clone = function () {
+THREE.MeshPhongMaterial.prototype.copy = function ( source ) {
 
-	var material = new THREE.MeshPhongMaterial();
+	THREE.Material.prototype.copy.call( this, source );
 
-	THREE.Material.prototype.clone.call( this, material );
+	this.color.copy( source.color );
+	this.emissive.copy( source.emissive );
+	this.specular.copy( source.specular );
+	this.shininess = source.shininess;
 
-	material.color.copy( this.color );
-	material.emissive.copy( this.emissive );
-	material.specular.copy( this.specular );
-	material.shininess = this.shininess;
+	this.metal = source.metal;
 
-	material.metal = this.metal;
+	this.map = source.map;
 
-	material.map = this.map;
+	this.lightMap = source.lightMap;
+	this.lightMapIntensity = source.lightMapIntensity;
 
-	material.lightMap = this.lightMap;
-	material.lightMapIntensity = this.lightMapIntensity;
+	this.aoMap = source.aoMap;
+	this.aoMapIntensity = source.aoMapIntensity;
 
-	material.aoMap = this.aoMap;
-	material.aoMapIntensity = this.aoMapIntensity;
+	this.emissiveMap = source.emissiveMap;
 
-	material.emissiveMap = this.emissiveMap;
+	this.bumpMap = source.bumpMap;
+	this.bumpScale = source.bumpScale;
 
-	material.bumpMap = this.bumpMap;
-	material.bumpScale = this.bumpScale;
+	this.normalMap = source.normalMap;
+	this.normalScale.copy( source.normalScale );
 
-	material.normalMap = this.normalMap;
-	material.normalScale.copy( this.normalScale );
+	this.specularMap = source.specularMap;
 
-	material.specularMap = this.specularMap;
+	this.alphaMap = source.alphaMap;
 
-	material.alphaMap = this.alphaMap;
+	this.envMap = source.envMap;
+	this.combine = source.combine;
+	this.reflectivity = source.reflectivity;
+	this.refractionRatio = source.refractionRatio;
 
-	material.envMap = this.envMap;
-	material.combine = this.combine;
-	material.reflectivity = this.reflectivity;
-	material.refractionRatio = this.refractionRatio;
+	this.fog = source.fog;
 
-	material.fog = this.fog;
+	this.shading = source.shading;
 
-	material.shading = this.shading;
+	this.wireframe = source.wireframe;
+	this.wireframeLinewidth = source.wireframeLinewidth;
+	this.wireframeLinecap = source.wireframeLinecap;
+	this.wireframeLinejoin = source.wireframeLinejoin;
 
-	material.wireframe = this.wireframe;
-	material.wireframeLinewidth = this.wireframeLinewidth;
-	material.wireframeLinecap = this.wireframeLinecap;
-	material.wireframeLinejoin = this.wireframeLinejoin;
+	this.vertexColors = source.vertexColors;
 
-	material.vertexColors = this.vertexColors;
+	this.skinning = source.skinning;
+	this.morphTargets = source.morphTargets;
+	this.morphNormals = source.morphNormals;
 
-	material.skinning = this.skinning;
-	material.morphTargets = this.morphTargets;
-	material.morphNormals = this.morphNormals;
+	return this;
+
+};
 
-	return material;
+THREE.MeshPhongMaterial.prototype.clone = function () {
+
+	var material = new THREE.MeshPhongMaterial();
+	return material.copy( this );
 
 };