diff -r a26b90a17c81 -r 8b2d4e5d96e4 test/min_cost_arborescence_test.cc
--- a/test/min_cost_arborescence_test.cc	Wed Nov 28 11:58:00 2012 +0100
+++ b/test/min_cost_arborescence_test.cc	Wed Aug 07 06:55:05 2013 +0200
@@ -91,7 +91,7 @@
   Arc e;
   VType c;
   bool b;
-  ignore_unused_variable_warning(c,b);
+  ::lemon::ignore_unused_variable_warning(c,b);
   int i;
   CostMap cost;
   ArbMap arb;
@@ -127,8 +127,8 @@
   i = const_mcarb_test.dualSize(i);
   c = const_mcarb_test.dualValue(i);
 
-  ignore_unused_variable_warning(am);
-  ignore_unused_variable_warning(pm);
+  ::lemon::ignore_unused_variable_warning(am);
+  ::lemon::ignore_unused_variable_warning(pm);
 }
 
 int main() {