diff --git a/src/extras/geometries/CircleGeometry.js b/src/extras/geometries/CircleGeometry.js
index 1c509626da999798a0bdc2f52b4d165c771d4011..b3e211f5ce685491a7335da3acdbd7acefcdeb91 100644
--- a/src/extras/geometries/CircleGeometry.js
+++ b/src/extras/geometries/CircleGeometry.js
@@ -5,8 +5,6 @@
 
 THREE.CircleGeometry = function ( radius, segments, thetaStart, thetaLength ) {
 
-	THREE.BufferGeometry.call( this );
-
 	this.parameters = {
 		radius: radius,
 		segments: segments,
@@ -58,13 +56,10 @@ THREE.CircleGeometry = function ( radius, segments, thetaStart, thetaLength ) {
 
 	}
 
-	this.attributes[ 'index' ] = { array: indices, itemSize: 1 };
-	this.attributes[ 'position' ] = { array: vertices, itemSize: 3 };
-	this.attributes[ 'normal' ] = { array: normals, itemSize: 3 };
-	this.attributes[ 'uv' ] = { array: uvs, itemSize: 2 };
+	THREE.IndexedGeometry2.call( this, indices, vertices, normals, uvs );
 
 	this.boundingSphere = new THREE.Sphere( new THREE.Vector3(), radius );
 
 };
 
-THREE.CircleGeometry.prototype = Object.create( THREE.BufferGeometry.prototype );
+THREE.CircleGeometry.prototype = Object.create( THREE.IndexedGeometry2.prototype );
diff --git a/src/extras/geometries/PlaneGeometry.js b/src/extras/geometries/PlaneGeometry.js
index 85480c043a27836e531aadfff582f1debc782f76..fdd767d315646dfd13b9995de645efdfd80c0c3d 100644
--- a/src/extras/geometries/PlaneGeometry.js
+++ b/src/extras/geometries/PlaneGeometry.js
@@ -5,8 +5,6 @@
 
 THREE.PlaneGeometry = function ( width, height, widthSegments, heightSegments ) {
 
-	THREE.BufferGeometry.call( this );
-
 	this.parameters = {
 		width: width,
 		height: height,
@@ -83,11 +81,8 @@ THREE.PlaneGeometry = function ( width, height, widthSegments, heightSegments )
 
 	}
 
-	this.attributes[ 'index' ] = { array: indices, itemSize: 1 };
-	this.attributes[ 'position' ] = { array: vertices, itemSize: 3 };
-	this.attributes[ 'normal' ] = { array: normals, itemSize: 3 };
-	this.attributes[ 'uv' ] = { array: uvs, itemSize: 2 };
+	THREE.IndexedGeometry2.call( this, indices, vertices, normals, uvs );
 
 };
 
-THREE.PlaneGeometry.prototype = Object.create( THREE.BufferGeometry.prototype );
+THREE.PlaneGeometry.prototype = Object.create( THREE.IndexedGeometry2.prototype );