--- ray/src/cv/thf2rad.c	1993/06/04 14:33:12	2.3
+++ ray/src/cv/thf2rad.c	1993/11/08 13:43:34	2.5
@@ -24,6 +24,10 @@ typedef struct {
 
 double	rad = 0.0;			/* line radius */
 
+#ifdef  DCL_ATOF
+extern double  atof();
+#endif
+
 
 main(argc, argv)
 int	argc;