diff -r 2f285162b6ca src/core/component-manager.h
--- a/src/core/component-manager.h	Tue May 15 17:12:36 2007 +0200
+++ b/src/core/component-manager.h	Wed May 16 18:08:35 2007 +0100
@@ -227,7 +227,7 @@ ComponentManager::Create (ClassId classI
 ComponentManager::Create (ClassId classId, InterfaceId iid)
 {
   Ptr<Interface> obj = Create (classId);
-  Ptr<T> i = obj->QueryInterface<T> (iid);
+  Ptr<T> i = obj->QueryInterface (iid, (T *) 0);
   return i;
 }
 
@@ -236,7 +236,7 @@ ComponentManager::Create (ClassId classI
 ComponentManager::Create (ClassId classId, InterfaceId iid, T1 a1)
 {
   Ptr<Interface> obj = Create (classId, a1);
-  Ptr<T> i = obj->QueryInterface<T> (iid);
+  Ptr<T> i = obj->QueryInterface (iid, (T *) 0);
   return i;
 }
 
@@ -245,7 +245,7 @@ ComponentManager::Create (ClassId classI
 ComponentManager::Create (ClassId classId, InterfaceId iid, T1 a1, T2 a2)
 {
   Ptr<Interface> obj = Create (classId, a1, a2);
-  Ptr<T> i = obj->QueryInterface<T> (iid);
+  Ptr<T> i = obj->QueryInterface (iid, (T *) 0);
   return i;
 }
 
diff -r 2f285162b6ca src/core/interface.h
--- a/src/core/interface.h	Tue May 15 17:12:36 2007 +0200
+++ b/src/core/interface.h	Wed May 16 18:06:54 2007 +0100
@@ -58,7 +58,7 @@ public:
    * \param iid the Interface id of the requested interface
    */
   template <typename T>
-  Ptr<T> QueryInterface (InterfaceId iid) const;
+  Ptr<T> QueryInterface (InterfaceId iid, T *dummy = (T *) 0) const;
 
   /**
    * \param interface another interface
@@ -114,7 +114,7 @@ namespace ns3 {
 
 template <typename T>
 Ptr<T>
-Interface::QueryInterface (InterfaceId iid) const
+Interface::QueryInterface (InterfaceId iid, T *dummy) const
 {
   Ptr<Interface> found = DoQueryInterface (iid);
   if (found != 0)