diff -r ef2d00e46897 -r c2992fd74dad lemon/kruskal.h
--- a/lemon/kruskal.h	Wed Feb 22 12:45:59 2006 +0000
+++ b/lemon/kruskal.h	Wed Feb 22 18:26:56 2006 +0000
@@ -23,6 +23,7 @@
 #include <vector>
 #include <lemon/unionfind.h>
 #include <lemon/utility.h>
+#include <lemon/traits.h>
 
 /**
 @defgroup spantree Minimum Cost Spanning Tree Algorithms
@@ -228,7 +229,7 @@
     };
 
     template<class _GR>
-    typename enable_if<typename _GR::UTag,void>::type
+    typename enable_if<UndirectedTagIndicator<_GR>,void>::type
     fillWithEdges(const _GR& g, const Map& m,dummy<0> = 0) 
     {
       for(typename GR::UEdgeIt e(g);e!=INVALID;++e) 
@@ -236,7 +237,7 @@
     }
 
     template<class _GR>
-    typename disable_if<typename _GR::UTag,void>::type
+    typename disable_if<UndirectedTagIndicator<_GR>,void>::type
     fillWithEdges(const _GR& g, const Map& m,dummy<1> = 1) 
     {
       for(typename GR::EdgeIt e(g);e!=INVALID;++e)