diff --git a/OpenSim/Region/Application/IApplicationPlugin.cs b/OpenSim/Region/Application/IApplicationPlugin.cs
new file mode 100644
index 0000000000..31ff0cfd5a
--- /dev/null
+++ b/OpenSim/Region/Application/IApplicationPlugin.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Mono.Addins;
+using Mono.Addins.Description;
+
+[assembly: AddinRoot("OpenSim", "0.4")]
+namespace OpenSim
+{
+    [TypeExtensionPoint("/OpenSim/Startup")]
+    public interface IApplicationPlugin
+    {
+        void Initialise(OpenSimMain openSim);
+        void Close();
+    }
+}
+