--- OLD/xc/programs/oclock/transform.c	Thu Jan  1 00:00:00 1970
+++ NEW/xc/programs/oclock/transform.c	Thu Jan  1 00:00:00 1970
@@ -28,6 +28,7 @@
  * transformed coordinate system objects for X
  */
 
+#include <stdlib.h>
 # include	<X11/Xlib.h>
 # include	"transform.h"