--- ray/src/px/colorscale.c	1991/11/12 16:05:21	2.1
+++ ray/src/px/colorscale.c	1993/06/04 14:46:22	2.3
@@ -12,6 +12,8 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include  <stdio.h>
 
+#include  <math.h>
+
 #include  "color.h"
 
 int  primary = -1;
@@ -22,7 +24,6 @@ main(argc, argv)
 int  argc;
 char  *argv[];
 {
-	double  atof();
 	int  i;
 
 	for (i = 1; i < argc && argv[i][0] == '-'; i++)