diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
index 181399d3ca..7bfe27bf23 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
@@ -549,7 +549,16 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Plugins
                     return;
 
                 toRegionPos = presence.AbsolutePosition;
-                dis = Math.Abs(Util.GetDistanceTo(toRegionPos, fromRegionPos));
+                dis = Util.GetDistanceTo(toRegionPos, fromRegionPos);
+                if (presence.IsSatOnObject && presence.ParentPart != null &&
+                    presence.ParentPart.ParentGroup != null &&
+                    presence.ParentPart.ParentGroup.RootPart != null)
+                {
+                    Vector3 rpos = presence.ParentPart.ParentGroup.RootPart.AbsolutePosition;
+                    double dis2 = Util.GetDistanceTo(rpos, fromRegionPos);
+                    if (dis > dis2)
+                        dis = dis2;
+                }
 
                 // Disabled for now since all osNpc* methods check for appropriate ownership permission.
                 // Perhaps could be re-enabled as an NPC setting at some point since being able to make NPCs not