diff -urNpa plotutils-2.4.1.orig/include/plotter.h plotutils-2.4.1/include/plotter.h
--- plotutils-2.4.1.orig/include/plotter.h	2008-11-29 07:01:45.000000000 +0300
+++ plotutils-2.4.1/include/plotter.h	2008-11-29 07:02:56.000000000 +0300
@@ -58,7 +58,9 @@ extern const char pl_libplot_ver[8];   /
 /* Include iostream, stdio support if this is libplotter rather than
    libplot. */
 #ifndef NOT_LIBPLOTTER
-#include <iostream.h>
+#include <iostream>
+using std::istream;
+using std::ostream;
 #include <stdio.h>
 #endif