--- ray/src/cv/thf2rad.c	1990/12/11 08:45:50	1.1
+++ ray/src/cv/thf2rad.c	1993/06/04 14:33:12	2.3
@@ -13,6 +13,7 @@ static char SCCSid[] = "$SunId$ LBL";
  */
 
 #include <stdio.h>
+#include <math.h>
 
 #define MAXSTR		128		/* maximum string or id length */
 #define MAXPTS		2048		/* maximum points per object */
@@ -28,7 +29,6 @@ main(argc, argv)
 int	argc;
 char	*argv[];
 {
-	extern double	atof();
 	char	*name = NULL;
 	int	an;