diff --git a/prebuild.xml b/prebuild.xml
index ed20126194..4301057732 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -787,7 +787,7 @@
       <Reference name="libsecondlife.dll"/>
       <Reference name="Axiom.MathLib.dll" localCopy="false"/>
       <Reference name="System" localCopy="false"/>
-      <Reference name="System.Data.dll"/>
+      <Reference name="System.Data"/>
       <Reference name="System.Xml"/>
 
       <Reference name="OpenSim.Framework.Console"/>