diff -r a2cd33e6f61c -r 6f1604392dc8 src/lemon/graph_wrapper.h
--- a/src/lemon/graph_wrapper.h	Sat Mar 05 19:04:45 2005 +0000
+++ b/src/lemon/graph_wrapper.h	Sun Mar 06 20:38:28 2005 +0000
@@ -970,7 +970,7 @@
       Parent::setBackwardFilterMap(cm);
     }
   public:
-    BidirGraphWrapper(Graph& _graph) : Parent() { 
+    BidirGraphWrapper(Graph& _graph) : Parent(), cm(true) { 
       Parent::setGraph(_graph);
       Parent::setForwardFilterMap(cm);
       Parent::setBackwardFilterMap(cm);