diff -r a954b780e3ab -r 81c8efe92706 lemon/graph_utils.h
--- a/lemon/graph_utils.h	Thu Feb 23 08:55:54 2006 +0000
+++ b/lemon/graph_utils.h	Thu Feb 23 09:03:18 2006 +0000
@@ -566,7 +566,7 @@
       return edgeRefMap;
     }
 
-    void run() {}
+    void run() const {}
 
   private:
     
@@ -777,7 +777,7 @@
       return uEdgeRefMap;
     }
 
-    void run() {}
+    void run() const {}
 
   private: