diff -r 257e91516e09 -r 1f08e846df29 lemon/circulation.h
--- a/lemon/circulation.h	Fri May 29 17:46:48 2009 +0100
+++ b/lemon/circulation.h	Tue Aug 18 10:24:31 2009 +0200
@@ -453,7 +453,7 @@
     /// \brief Sets the tolerance used by algorithm.
     ///
     /// Sets the tolerance used by algorithm.
-    Circulation& tolerance(const Tolerance& tolerance) const {
+    Circulation& tolerance(const Tolerance& tolerance) {
       _tol = tolerance;
       return *this;
     }
@@ -462,7 +462,7 @@
     ///
     /// Returns a const reference to the tolerance.
     const Tolerance& tolerance() const {
-      return tolerance;
+      return _tol;
     }
 
     /// \name Execution Control