diff --git a/docs/api/core/Object3D.html b/docs/api/core/Object3D.html
index ffd14c56be2d3e4039565461e967739e8dfbde02..35ca4ea3d98a8f17bc271e14c88a7d2512629cb5 100644
--- a/docs/api/core/Object3D.html
+++ b/docs/api/core/Object3D.html
@@ -66,7 +66,7 @@
 
 		<h3>[property:Vector3 up]</h3>
 		<div>
-		Up direction.
+		Up direction. Default is THREE.Vector3( 0, 1, 0 ).
 		</div>
 
 		<h3>[property:Matrix4 matrix]</h3>