diff --git a/OpenSim/Region/Environment/Scenes/scripting/Engines/CSharpScriptEngine.cs b/OpenSim/Region/Environment/Scenes/scripting/Engines/CSharpScriptEngine.cs
index a232b65563..fc193f5d85 100644
--- a/OpenSim/Region/Environment/Scenes/scripting/Engines/CSharpScriptEngine.cs
+++ b/OpenSim/Region/Environment/Scenes/scripting/Engines/CSharpScriptEngine.cs
@@ -51,6 +51,7 @@ namespace OpenSim.Region.Enviorment.Scripting
             compilerParams.GenerateInMemory = true;
             compilerParams.IncludeDebugInformation = false;
             compilerParams.ReferencedAssemblies.Add("OpenSim.Region.dll");
+            compilerParams.ReferencedAssemblies.Add("OpenSim.Region.Enviroment.dll");
             compilerParams.ReferencedAssemblies.Add("OpenSim.Framework.dll");
             compilerParams.ReferencedAssemblies.Add("libsecondlife.dll");
             compilerParams.ReferencedAssemblies.Add("System.dll");
diff --git a/OpenSim/Region/Environment/Scenes/scripting/Engines/JScriptEngine.cs b/OpenSim/Region/Environment/Scenes/scripting/Engines/JScriptEngine.cs
index 2d44223bb8..e6d66eb2c5 100644
--- a/OpenSim/Region/Environment/Scenes/scripting/Engines/JScriptEngine.cs
+++ b/OpenSim/Region/Environment/Scenes/scripting/Engines/JScriptEngine.cs
@@ -51,6 +51,7 @@ namespace OpenSim.Region.Enviorment.Scripting
             compilerParams.GenerateInMemory = true;
             compilerParams.IncludeDebugInformation = false;
             compilerParams.ReferencedAssemblies.Add("OpenSim.Region.dll");
+            compilerParams.ReferencedAssemblies.Add("OpenSim.Region.Enviroment.dll");
             compilerParams.ReferencedAssemblies.Add("OpenSim.Framework.dll");
             compilerParams.ReferencedAssemblies.Add("libsecondlife.dll");
             compilerParams.ReferencedAssemblies.Add("System.dll");