diff --git a/prebuild.xml b/prebuild.xml
index 9634eb5c2d..16f076bbaa 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -1548,6 +1548,7 @@
       <Reference name="OpenMetaverse.StructuredData.dll"/>
       <Reference name="OpenSim.Framework"/>
       <Reference name="OpenSim.Framework.Console"/>
+      <Reference name="OpenSim.Framework.Servers.HttpServer"/>
       <Reference name="OpenSim.Server.Base"/>
       <Reference name="OpenSim.Server.Handlers"/>
       <Reference name="Nini.dll" />