diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index be94508000..5a3b518d99 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -2032,7 +2032,7 @@ namespace OpenSim.Region.Framework.Scenes
 //                m_log.DebugFormat("[SCENE PRESENCE]: {0} {1}", SitTargetisSet, SitTargetUnOccupied);
 
             if (PhysicsActor != null)
-                m_sitAvatarHeight = PhysicsActor.Size.Z;
+                m_sitAvatarHeight = PhysicsActor.Size.Z * 0.5f;
 
             bool canSit = false;
             pos = part.AbsolutePosition + offset;