diff -ruN zipios++-0.1.5.9+cvs.2007.04.28.orig/src/directory.h zipios++-0.1.5.9+cvs.2007.04.28/src/directory.h
--- zipios++-0.1.5.9+cvs.2007.04.28.orig/src/directory.h 2003-01-04 06:45:34.000000000 +0800
+++ zipios++-0.1.5.9+cvs.2007.04.28/src/directory.h 2012-01-24 22:30:20.362767134 +0800
@@ -56,6 +56,8 @@
namespace boost
{
+ using std::ptrdiff_t;
+
namespace filesystem
{
class dir_it;