diff -r df89dd6c9be5 src/core/ptr.h
--- a/src/core/ptr.h	Thu Mar 26 17:59:21 2009 +0100
+++ b/src/core/ptr.h	Fri Mar 27 12:52:07 2009 +0100
@@ -106,7 +106,7 @@
   T *operator -> () const;
   T *operator -> ();
   const T &operator * () const;
-  const T &operator * ();
+  T &operator * ();
   // allow if (!sp)
   bool operator! ();
   // allow if (sp)
@@ -486,7 +486,7 @@
 }
 
 template <typename T>
-const T &
+T &
 Ptr<T>::operator * ()
 {
   return *m_ptr;