diff --git a/prebuild.xml b/prebuild.xml
index a5d8b2ff81..835cfc2549 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -102,8 +102,7 @@
       <Reference name="System.Drawing"/>
       <Reference name="System.Web"/>
       <Reference name="System.Security"/>
-      <Reference name="System.Security.Cryptography"/>
-      <Reference name="OpenMetaverseTypes" path="../../bin/"/>
+       <Reference name="OpenMetaverseTypes" path="../../bin/"/>
       <Reference name="OpenMetaverse" path="../../bin/"/>
       <Reference name="OpenMetaverse.StructuredData" path="../../bin/"/>
       <Reference name="XMLRPC" path="../../bin/"/>