--- a/src/core/object-factory.cc	Mon Apr 14 16:19:17 2008 -0700
+++ b/src/core/object-factory.cc	Thu Apr 17 13:42:25 2008 -0700
@@ -41,7 +41,7 @@
   m_tid = TypeId::LookupByName (tid);
 }
 void 
-ObjectFactory::Set (std::string name, Attribute value)
+ObjectFactory::Set (std::string name, const AttributeValue &value)
 {
   if (name == "")
     {