diff --git a/src/core/Geometry.js b/src/core/Geometry.js
index 7ba9977a7334eab29aa71decddef31f8970c6f72..b9fb4a7286535c27d568ab20553f90b67d55af0c 100644
--- a/src/core/Geometry.js
+++ b/src/core/Geometry.js
@@ -312,7 +312,7 @@ THREE.Geometry.prototype = {
 
 		} else {
 
-			for ( var i = 0; i < vertices.length / 3; i += 3 ) {
+			for ( var i = 0; i < vertices.length; i += 3 ) {
 
 				addFace( i, i + 1, i + 2 );