diff -r acc83957ee4a -r 2570784896d8 src/test/preflow_test.cc
--- a/src/test/preflow_test.cc	Wed Sep 15 14:25:44 2004 +0000
+++ b/src/test/preflow_test.cc	Wed Sep 15 14:38:13 2004 +0000
@@ -69,9 +69,9 @@
 
   typedef Preflow<Graph, int> PType;
 
-  string f_name;
+  std::string f_name;
   if( getenv("srcdir") ) {
-    f_name = string(getenv("srcdir")) + "/preflow_graph.inp";
+    f_name = std::string(getenv("srcdir")) + "/preflow_graph.inp";
   }
   else {
     f_name = "preflow_graph.inp";