diff --git a/examples/js/effects/StereoEffect.js b/examples/js/effects/StereoEffect.js
index 7930491271f8a123f4ff939937a2c2de46379471..973c08eaf9098c8fc1c88ec37ea8fc597368a422 100644
--- a/examples/js/effects/StereoEffect.js
+++ b/examples/js/effects/StereoEffect.js
@@ -32,8 +32,8 @@ THREE.StereoEffect = function ( renderer ) {
 
 		var size = renderer.getSize();
 
-		renderer.setScissorTest( true );
 		renderer.clear();
+		renderer.setScissorTest( true );
 
 		renderer.setScissor( 0, 0, size.width / 2, size.height );
 		renderer.setViewport( 0, 0, size.width / 2, size.height );