--- a/src/core/ref-count-base.h	Sat Nov 14 21:55:18 2009 +0100
+++ b/src/core/ref-count-base.h	Sun Nov 15 09:16:32 2009 +0100
@@ -40,7 +40,7 @@
   /**
    * This only thing this class does it declare a virtual destructor
    */
-  virtual ~RefCountBase () = 0;
+  virtual ~RefCountBase ();
 };
 
 } // namespace ns3