diff --git a/src/BasicPathFinding.cs b/src/BasicPathFinding.cs
index c1b7f6c..3bfee63 100644
--- a/src/BasicPathFinding.cs
+++ b/src/BasicPathFinding.cs
@@ -232,7 +232,7 @@ namespace OpenSim.Modules.PathFinding
             UUID requestKey = UUID.Random();
  
             SceneObjectGroup _host = m_scene.GetSceneObjectGroup(hostID);
-            (new Thread(delegate () { generatePathEnvironment(new ScriptRequestData(hostID, scriptID), size); })).Start();
+            (new Thread(delegate () { generatePathEnvironment(new ScriptRequestData(hostID, scriptID, null, requestKey), size); })).Start();
 
             return requestKey.ToString();
         }