diff -r e746fb14e680 -r 432c54cec63c lemon/bits/map_extender.h
--- a/lemon/bits/map_extender.h	Tue Aug 18 10:08:28 2009 +0200
+++ b/lemon/bits/map_extender.h	Thu Nov 05 08:39:49 2009 +0100
@@ -49,6 +49,8 @@
     typedef typename Parent::Reference Reference;
     typedef typename Parent::ConstReference ConstReference;
 
+    typedef typename Parent::ReferenceMapTag ReferenceMapTag;
+
     class MapIt;
     class ConstMapIt;
 
@@ -191,6 +193,8 @@
     typedef typename Parent::Reference Reference;
     typedef typename Parent::ConstReference ConstReference;
 
+    typedef typename Parent::ReferenceMapTag ReferenceMapTag;
+
     class MapIt;
     class ConstMapIt;