diff --git a/examples/js/postprocessing/EffectComposer.js b/examples/js/postprocessing/EffectComposer.js
index 1e7e638d1707fea679589f166130d5acedb7d3e9..8876413b265e28d6bf380ea6cc03e209acf90081 100644
--- a/examples/js/postprocessing/EffectComposer.js
+++ b/examples/js/postprocessing/EffectComposer.js
@@ -14,22 +14,35 @@ THREE.EffectComposer = function ( renderer, renderTarget ) {
 			format: THREE.RGBAFormat,
 			stencilBuffer: false
 		};
+
 		var size = renderer.getSize();
 		renderTarget = new THREE.WebGLRenderTarget( size.width, size.height, parameters );
-		renderTarget.texture.name = "EffectComposer.rt1";
+		renderTarget.texture.name = 'EffectComposer.rt1';
+
 	}
 
 	this.renderTarget1 = renderTarget;
 	this.renderTarget2 = renderTarget.clone();
-	this.renderTarget2.texture.name = "EffectComposer.rt2";
+	this.renderTarget2.texture.name = 'EffectComposer.rt2';
 
 	this.writeBuffer = this.renderTarget1;
 	this.readBuffer = this.renderTarget2;
 
 	this.passes = [];
 
-	if ( THREE.CopyShader === undefined )
-		console.error( "THREE.EffectComposer relies on THREE.CopyShader" );
+	// dependencies
+
+	if ( THREE.CopyShader === undefined ) {
+
+		console.error( 'THREE.EffectComposer relies on THREE.CopyShader' );
+
+	}
+
+	if ( THREE.ShaderPass === undefined ) {
+
+		console.error( 'THREE.EffectComposer relies on THREE.ShaderPass' );
+
+	}
 
 	this.copyPass = new THREE.ShaderPass( THREE.CopyShader );
 
@@ -169,7 +182,7 @@ Object.assign( THREE.Pass.prototype, {
 
 	render: function ( renderer, writeBuffer, readBuffer, delta, maskActive ) {
 
-		console.error( "THREE.Pass: .render() must be implemented in derived pass." );
+		console.error( 'THREE.Pass: .render() must be implemented in derived pass.' );
 
 	}
 
diff --git a/examples/webgl_postprocessing.html b/examples/webgl_postprocessing.html
index c052af29d7fc41f1f4bff64eeb0f4dae2e1c6892..3c1b01caf7c60e134d50ca1a70e47ff958c5eb3f 100644
--- a/examples/webgl_postprocessing.html
+++ b/examples/webgl_postprocessing.html
@@ -22,7 +22,6 @@
 
 		<script src="js/postprocessing/EffectComposer.js"></script>
 		<script src="js/postprocessing/RenderPass.js"></script>
-		<script src="js/postprocessing/MaskPass.js"></script>
 		<script src="js/postprocessing/ShaderPass.js"></script>