diff -r 157427808b40 -r 761fe0846f49 lemon/concepts/maps.h
--- a/lemon/concepts/maps.h	Fri Aug 24 15:37:23 2012 +0200
+++ b/lemon/concepts/maps.h	Thu Sep 13 11:45:36 2012 +0200
@@ -49,7 +49,7 @@
 
       /// Returns the value associated with the given key.
       Value operator[](const Key &) const {
-        return *static_cast<Value *>(0);
+        return *(static_cast<Value *>(0)+1);
       }
 
       template<typename _ReadMap>