Index: doctype/dif.cxx
--- doctype/dif.cxx.orig
+++ doctype/dif.cxx
@@ -6,7 +6,7 @@ Author:		Archie Warnock, warnock@clark.net
                 Bug fixes from Ed Zimmerman
 @@@*/
 
-#include <iostream.h>
+#include <iostream>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
