diff --git a/prebuild.xml b/prebuild.xml
index 3aa71149df..030ea1caa5 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -2220,6 +2220,7 @@
       <Reference name="OpenSim.Region.Interfaces" />
       <Reference name="OpenSim.Region.ScriptEngine.Shared"/>
       <Reference name="OpenSim.Region.ScriptEngine.Shared.Api"/>
+      <Reference name="OpenSim.Region.ScriptEngine.Shared.Api.Runtime"/>
       <Reference name="OpenSim.Region.ScriptEngine.Shared.CodeTools"/>
       <Reference name="Microsoft.JScript"/>
       <Reference name="Nini.dll" />