diff -r 0c6556a8e105 -r 716b220697a0 lemon/bits/traits.h
--- a/lemon/bits/traits.h	Fri Jun 20 11:09:30 2008 +0100
+++ b/lemon/bits/traits.h	Thu Mar 27 16:27:23 2008 +0100
@@ -150,8 +150,8 @@
     typedef typename Map::Key Key;
     typedef typename Map::Value Value;
 
-    typedef const Value ConstReturnValue;
-    typedef const Value ReturnValue;
+    typedef Value ConstReturnValue;
+    typedef Value ReturnValue;
   };
 
   template <typename Map>
@@ -178,8 +178,8 @@
     typedef typename MatrixMap::SecondKey SecondKey;
     typedef typename MatrixMap::Value Value;
 
-    typedef const Value ConstReturnValue;
-    typedef const Value ReturnValue;
+    typedef Value ConstReturnValue;
+    typedef Value ReturnValue;
   };
 
   template <typename MatrixMap>