--- src/graph.cpp.orig	Wed Jan 12 14:25:24 2000
+++ src/graph.cpp	Wed Jan 12 14:25:51 2000
@@ -24,6 +24,8 @@
 #include <fstream>
 #include <string>
 
+#include <map>
+
 __GTL_BEGIN_NAMESPACE
 
 //--------------------------------------------------------------------------