diff --git a/prebuild.xml b/prebuild.xml
index 5e8495ee1d..ce7f4eaab5 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -1170,6 +1170,7 @@
       <Reference name="OpenSim"/>
       <Reference name="OpenSim.Region.ClientStack"/>
       <Reference name="OpenSim.Region.Environment"/>
+      <Reference name="OpenSim.Region.Framework"/>
       <Reference name="OpenSim.Framework"/>
       <Reference name="OpenSim.Framework.Console"/>
       <Reference name="OpenSim.Framework.RegionLoader.Filesystem"/>