--- file_iterator.1.15.hpp	Tue Jun 05 13:38:11 2007
+++ file_iterator.hpp	Tue Jun 05 11:37:32 2007
@@ -123,7 +123,7 @@
             value_type const,
             std::random_access_iterator_tag,
             boost::use_default,
-            signed long
+            std::ptrdiff_t
         > type;
     };