diff --git a/prebuild.xml b/prebuild.xml
index e2423ae0a0..aef5722e0c 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -2230,7 +2230,6 @@
       <Reference name="OpenSim.Framework"/>
       <Reference name="OpenSim.Region.Framework"/>
       <Reference name="OpenSim.Region.ScriptEngine.Shared"/>
-      <Reference name="OpenSim.Region.ScriptEngine.Shared.YieldProlog"/>
       <Reference name="OpenSim.Region.CoreModules"/>
       <Reference name="OpenMetaverseTypes" path="../../../../../bin/"/>
       <Reference name="Nini" path="../../../../../bin/"/>