--- a/src/helper/mobility-helper.h	Tue Apr 08 23:12:19 2008 -0700
+++ b/src/helper/mobility-helper.h	Wed Apr 09 09:08:54 2008 -0700
@@ -40,6 +40,7 @@
 {
 public:
   MobilityHelper ();
+  ~MobilityHelper ();
 
   /**
    * After this method is called, every call to MobilityHelper::Layout