diff --git a/prebuild.xml b/prebuild.xml
index b999087457..b6b18df967 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -3269,6 +3269,7 @@
       <Reference name="OpenSim.Framework.Monitoring"/>
       <Reference name="OpenSim.Framework.Servers"/>
       <Reference name="OpenSim.Framework.Servers.HttpServer"/>
+      <Reference name="OpenSim.Framework.Serialization"/>
       <Reference name="OpenSim.Region.ClientStack"/>
       <Reference name="OpenSim.Region.ClientStack.LindenCaps"/>
       <Reference name="OpenSim.Region.Framework"/>