--- dynPenOp.c.orig	Tue Apr 21 00:57:13 1998
+++ dynPenOp.c	Tue Apr 21 01:08:15 1998
@@ -24,11 +24,12 @@
 #include <X11/Intrinsic.h>
 #include <X11/StringDefs.h>
 #include <X11/cursorfont.h>
+#include <time.h>
 #include "xpaint.h"
 #include "misc.h"
 #include "Paint.h"
 
-#define XTIMEOUT ((unsigned long)(1.5*1000/HZ)) /* ms, should be larger than 1000/HZ */
+#define XTIMEOUT ((unsigned long)(1.5*1000/CLK_TCK)) /* ms, should be larger than 1000/HZ */
 
 typedef struct {
 	float	startx, starty;