--- driver/xscreensaver.h.orig	Tue Jul 22 00:14:02 2003
+++ driver/xscreensaver.h	Tue Jul 22 00:14:10 2003
@@ -19,6 +19,7 @@
 
 #include <string.h>
 #include <stdio.h>
+#include <signal.h>
 
 #include "prefs.h"