--- dynPenOp.c.orig	Wed Aug 13 16:10:00 1997
+++ dynPenOp.c	Fri Aug 29 14:08:48 1997
@@ -28,6 +28,11 @@
 #include "misc.h"
 #include "Paint.h"
 
+#ifndef HZ
+#include <time.h>
+#define HZ CLK_TCK
+#endif
+
 #define XTIMEOUT ((unsigned long)(1.5*1000/HZ)) /* ms, should be larger than 1000/HZ */
 
 typedef struct {
