--- ray/src/cv/lampcolor.c	1992/01/10 11:17:13	2.3
+++ ray/src/cv/lampcolor.c	1993/06/04 14:32:44	2.4
@@ -10,14 +10,13 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include <stdio.h>
 
+#include <math.h>
+
 #include "color.h"
 
 #define PI	3.14159265358979323846
 
 extern char	*gets(), *strcpy();
-#ifndef atof
-extern double	atof();
-#endif
 extern float	*matchlamp();
 
 				/* lamp parameters */