diff --git a/prebuild.xml b/prebuild.xml
index 1dec8835bc..15be54ea26 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -1510,6 +1510,7 @@
       <Reference name="Nini.dll" />
       <Reference name="OpenSim"/>
       <Reference name="OpenSim.Framework"/>
+      <Reference name="OpenSim.Framework.Servers"/>
       <Reference name="OpenSim.Region.Framework"/>
       <Reference name="OpenSim.Region.ClientStack"/>
       <Reference name="System"/>