diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index edcdbd3512..1a5e9d6cf2 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -1001,7 +1001,7 @@ namespace OpenSim.Region.Framework.Scenes
             get
             {
                 PhysicsActor actor = PhysActor;
-                if (actor != null)
+                if (actor != null && actor.IsPhysical)
                 {
                     m_acceleration = actor.Acceleration;
                 }