diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs
index 87401bbfd9..1f8b85a6df 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs
@@ -5,6 +5,7 @@ using System.Text;
 
 namespace OpenSim.Region.ScriptEngine.Shared.Api.Runtime
 {
+    [Serializable]
     public class ScriptSponsor: ISponsor
     {
         // In theory: I execute, therefore I am.