diff --git a/include/boost/graph/detail/intset.hpp b/include/boost/graph/detail/intset.hpp
new file mode 100644
index 00000000..38b59593
--- /dev/null
+++ b/include/boost/graph/detail/intset.hpp
@@ -0,0 +1,35 @@
+
+
+// (C) Copyright Jeremy Siek 2001. Permission to copy, use, modify,
+// sell and distribute this software is granted provided this
+// copyright notice appears in all copies. This software is provided
+// "as is" without express or implied warranty, and with no claim as
+// to its suitability for any purpose.
+
+#include <boost/config.hpp>
+
+// UNDER CONSTRUCTION
+
+namespace boost {
+
+  namespace detail {
+    
+    template <typename SizeType, 
+              typename Allocator = std::allocator<SizeType> >
+    class intset {
+    public:
+      intset(SizeType n) : m_index(n), m_value(n) {
+	
+      }
+      
+    private:
+      std::vector<SizeType, Allocator> m_index;
+      std::vector<SizeType, Allocator> m_value;
+      size_type m_next;
+    };
+    
+    
+
+  } // namespace detail 
+
+} // namespace boost