--- a/src/helper/point-to-point-helper.h	Mon Apr 14 16:19:17 2008 -0700
+++ b/src/helper/point-to-point-helper.h	Thu Apr 17 13:42:25 2008 -0700
@@ -56,10 +56,10 @@
    * PointToPointNetDevice created through PointToPointHelper::Install.
    */
   void SetQueue (std::string type,
-		 std::string n1 = "", Attribute v1 = Attribute (),
-		 std::string n2 = "", Attribute v2 = Attribute (),
-		 std::string n3 = "", Attribute v3 = Attribute (),
-		 std::string n4 = "", Attribute v4 = Attribute ());
+		 std::string n1 = "", const AttributeValue &v1 = EmptyAttributeValue (),
+		 std::string n2 = "", const AttributeValue &v2 = EmptyAttributeValue (),
+		 std::string n3 = "", const AttributeValue &v3 = EmptyAttributeValue (),
+		 std::string n4 = "", const AttributeValue &v4 = EmptyAttributeValue ());
 
   /**
    * \param name the name of the attribute to set
@@ -68,7 +68,7 @@
    * Set these parameters on each ns3::PointToPointNetDevice created
    * by PointToPointHelper::Install
    */
-  void SetDeviceParameter (std::string name, Attribute value);
+  void SetDeviceParameter (std::string name, const AttributeValue &value);
   /**
    * \param name the name of the attribute to set
    * \param value the value of the attribute to set
@@ -76,7 +76,7 @@
    * Set these parameters on each ns3::PointToPointChannel created
    * by PointToPointHelper::Install
    */
-  void SetChannelParameter (std::string name, Attribute value);
+  void SetChannelParameter (std::string name, const AttributeValue &value);
 
   /**
    * \param filename filename prefix to use for pcap files.