diff --git a/prebuild.xml b/prebuild.xml
index 648ebe0ebe..0c28e2b88b 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -675,6 +675,8 @@
       <Reference name="OpenSim.Framework.Console"/>
       <Reference name="OpenSim.Region.Physics.Manager"/>
       <Reference name="OpenSim.Framework.Servers"/>
+      <Reference name="OpenSim.Framework.RegionLoader.FileSystem"/>
+      <Reference name="OpenSim.Framework.RegionLoader.Web"/>
       <Reference name="OpenSim.Region.Environment"/>
       <Reference name="OpenSim.Region.ClientStack"/>
       <Reference name="OpenSim.Framework.Communications"/>