--- a/src/simulator/scheduler-heap.cc	Tue May 15 17:12:36 2007 +0200
+++ b/src/simulator/scheduler-heap.cc	Wed May 16 13:37:39 2007 -0400
@@ -37,6 +37,7 @@
 #include "event-impl.h"
 #include "ns3/assert.h"
 
+#include <string>
 #define noTRACE_HEAP 1
 
 #ifdef TRACE_HEAP