diff -r 98ddf8d5fda9 -r 71fd280363d5 lemon/bits/edge_set_extender.h --- a/lemon/bits/edge_set_extender.h Tue Dec 20 17:36:41 2011 +0100 +++ b/lemon/bits/edge_set_extender.h Tue Dec 20 17:38:19 2011 +0100 @@ -280,6 +280,8 @@ typedef EdgeSetExtender Graph; + typedef True UndirectedTag; + typedef typename Parent::Node Node; typedef typename Parent::Arc Arc; typedef typename Parent::Edge Edge;