diff -r 10c9c3a35b83 -r 8e68671af789 lemon/bits/map_extender.h
--- a/lemon/bits/map_extender.h	Wed Sep 30 08:36:43 2009 +0200
+++ b/lemon/bits/map_extender.h	Wed Sep 30 08:41:06 2009 +0200
@@ -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;