diff --git a/prebuild.xml b/prebuild.xml
index 328abcec42..a07ad14154 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -1323,6 +1323,7 @@
       <Reference name="System.Drawing"/>
       <Reference name="System.Xml"/>
       <Reference name="System.Web"/>
+      <Reference name="System.Core"/>
       <Reference name="OpenMetaverse" path="../../../bin/"/>
       <Reference name="OpenMetaverseTypes" path="../../../bin/"/>
       <Reference name="OpenMetaverse.StructuredData" path="../../../bin/"/>
@@ -1623,7 +1624,7 @@
       <Reference name="OpenSim.Framework.Console"/>
       <Reference name="OpenSim.Region.Physics.Manager"/>
       <Reference name="OpenSim.Services.Interfaces"/>
-      <Reference name="Mono.Addins" path="../../../../bin/"/>
+      <Reference name="Mono.Addins" path="../../../../../bin/"/>
       <Reference name="Nini" path="../../../../../bin/"/>
       <Reference name="log4net" path="../../../../../bin/"/>
       <Reference name="Nini" path="../../../../../bin/"/>