diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index cbd99bb7c6..77dcc6fe68 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -65,7 +65,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
     /// <summary>
     /// Contains all LSL ll-functions. This class will be in Default AppDomain.
     /// </summary>
-    public class LSL_Api : ILSL_Api, IScriptApi
+    public class LSL_Api : MarshalByRefObject, ILSL_Api, IScriptApi
     {
         protected IScriptEngine m_ScriptEngine;
         protected SceneObjectPart m_host;
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs
index 1f8b85a6df..5b286089ae 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs
@@ -6,7 +6,7 @@ using System.Text;
 namespace OpenSim.Region.ScriptEngine.Shared.Api.Runtime
 {
     [Serializable]
-    public class ScriptSponsor: ISponsor
+    public class ScriptSponsor : MarshalByRefObject, ISponsor
     {
         // In theory: I execute, therefore I am.
         // If GC collects this class then sponsorship will expire