diff --git a/prebuild.xml b/prebuild.xml
index 0f3471309d..f10607d39e 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -3264,6 +3264,7 @@
 
       <ReferencePath>../../../bin/</ReferencePath>
       <Reference name="System"/>
+      <Reference name="System.Core"/>
       <Reference name="System.Xml"/>
       <Reference name="System.Data"/>
       <Reference name="log4net" path="../../../bin/"/>