diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 0619839..006fb6d 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -60,6 +60,13 @@
 
 PIXI.Spine.constructor = PIXI.Spine;
 PIXI.Spine.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
+
+/*
+ * Updates the object transform for rendering
+ *
+ * @method updateTransform
+ * @private
+ */
 PIXI.Spine.prototype.updateTransform = function()
 {
 	// TODO should make this time based really..