--- ray/src/gen/genbox.c	1991/12/19 15:08:16	2.2
+++ ray/src/gen/genbox.c	1993/06/04 14:29:58	2.3
@@ -12,9 +12,8 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include  <stdio.h>
 
-#ifndef atof
-extern double  atof();
-#endif
+#include  <math.h>
+
 
 char  let[]="0123456789._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";