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diff --git a/src/stlplus/persistence/persistent_cstring.hpp b/src/stlplus/persistence/persistent_cstring.hpp
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+++ b/src/stlplus/persistence/persistent_cstring.hpp
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+#ifndef STLPLUS_PERSISTENT_CSTRING
+#define STLPLUS_PERSISTENT_CSTRING
+////////////////////////////////////////////////////////////////////////////////
+
+//   Author:    Andy Rushton
+//   Copyright: (c) Southampton University 1999-2004
+//              (c) Andy Rushton           2004-2009
+//   License:   BSD License, see ../docs/license.html
+
+//   Persistence of C-style char* strings
+
+//   These are handled differently to other pointer types
+
+//   Warning! This means that pointers to char cannot be supported, since there
+//   is no type difference between a pointer to char and a C-style array of char.
+
+//   Warning! The restore deletes any old value of the data parameter and
+//   allocates a new char* which is (just) big enough and assigns it to the data
+//   field. This is because there is no way of knowing how long a char* is so
+//   the passed parameter is not safe to use. The allocation is done using
+//   standard new. If the data field is non-null on entry it will be deleted by
+//   standard delete. Best to make it null in the first place.
+
+////////////////////////////////////////////////////////////////////////////////
+
+#include "persistence_fixes.hpp"
+#include "persistent_contexts.hpp"
+
+////////////////////////////////////////////////////////////////////////////////
+
+namespace stlplus
+{
+
+  void dump_cstring(dump_context&, const char* data) throw(persistent_dump_failed);
+  void restore_cstring(restore_context&, char*& data) throw(persistent_restore_failed);
+
+} // end namespace stlplus
+
+  ////////////////////////////////////////////////////////////////////////////////
+#endif