diff --git a/OpenSim/Region/ScriptEngine/DotNetEngine/ScriptEngine.cs b/OpenSim/Region/ScriptEngine/DotNetEngine/ScriptEngine.cs
index d3269e1805..9911feccf1 100644
--- a/OpenSim/Region/ScriptEngine/DotNetEngine/ScriptEngine.cs
+++ b/OpenSim/Region/ScriptEngine/DotNetEngine/ScriptEngine.cs
@@ -37,6 +37,7 @@ using OpenSim.Region.Environment.Interfaces;
 using OpenSim.Region.Environment.Scenes;
 using OpenSim.Region.ScriptEngine.Interfaces;
 using OpenMetaverse;
+using OpenMetaverse.StructuredData;
 using OpenSim.Region.ScriptEngine.Shared;
 using OpenSim.Region.ScriptEngine.Shared.ScriptBase;
 
diff --git a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
index 86dc824044..94d1fa7285 100644
--- a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
+++ b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
@@ -35,6 +35,7 @@ using System.Reflection;
 using System.Globalization;
 using System.Xml;
 using OpenMetaverse;
+using OpenMetaverse.StructuredData;
 using log4net;
 using Nini.Config;
 using Amib.Threading;
diff --git a/prebuild.xml b/prebuild.xml
index d447ecfb64..702fefa3bd 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -1959,6 +1959,7 @@
       <Reference name="System.Web" localCopy="false"/>
       <Reference name="System.Xml" localCopy="false"/>
       <Reference name="OpenMetaverseTypes.dll"/>
+      <Reference name="OpenMetaverse.dll"/>
       <Reference name="OpenSim" />
       <Reference name="OpenSim.Framework"/>
       <Reference name="OpenSim.Framework.Communications"/>
@@ -1999,6 +2000,7 @@
       <Reference name="System.Xml" localCopy="false"/>
       <Reference name="System.Runtime.Remoting" localCopy="false"/>
       <Reference name="OpenMetaverseTypes.dll"/>
+      <Reference name="OpenMetaverse.dll"/>
       <Reference name="RAIL.dll"/>
       <Reference name="OpenSim.Framework"/>
       <Reference name="OpenSim.Framework.Console"/>