diff --git a/prebuild.xml b/prebuild.xml
index ac03d2d383..b9830decbd 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -3303,6 +3303,7 @@
 
       <ReferencePath>../../../bin/</ReferencePath>
       <Reference name="System"/>
+      <Reference name="System.Core"/>
       <Reference name="System.Xml"/>
       <Reference name="System.Data"/>
       <Reference name="log4net" path="../../../bin/"/>