diff --git a/src/extras/core/Shape.js b/src/extras/core/Shape.js
index 163be68f..86613e4e 100644
--- a/src/extras/core/Shape.js
+++ b/src/extras/core/Shape.js
@@ -138,7 +138,7 @@ THREE.Shape.Utils = {
 			holes.push( hole );
 			*/
 
-			allpoints = allpoints.concat( hole );
+			Array.prototype.push.apply( allpoints, hole );
 
 			shortest = Number.POSITIVE_INFINITY;