--- do_help.c.orig	Mon Aug 23 07:49:59 2010
+++ do_help.c	Mon Aug 23 07:50:13 2010
@@ -293,6 +293,8 @@ modification follow.
 /* This routine is expected to clear the screen, draw the help screen,
    wait for a key and then return */
 
+#include <string.h>
+
 #include "periodic.h"
 
 struct GNU {