--- ray/src/cv/mgflib/xf.c	1995/11/29 19:55:45	1.12
+++ ray/src/cv/mgflib/xf.c	1997/12/15 09:41:37	1.13
@@ -10,6 +10,7 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include <stdio.h>
 #include <math.h>
+#include <stdlib.h>
 #include <string.h>
 #include "parser.h"