--- ray/src/common/readfargs.c	1993/05/18 09:26:05	2.3
+++ ray/src/common/readfargs.c	1993/09/08 09:12:36	2.5
@@ -10,6 +10,8 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include <stdio.h>
 
+#include <math.h>
+
 #include "fvect.h"
 
 #include "object.h"
@@ -19,10 +21,11 @@ static char SCCSid[] = "$SunId$ LBL";
 #define  bmalloc	malloc
 #endif
 
-extern char  *bmalloc(), *savestr(), *fgetword();
-#ifndef atof
+#ifdef  DCL_ATOF
 extern double  atof();
 #endif
+
+extern char  *bmalloc(), *savestr(), *fgetword();
 extern int  atoi();
 extern long  atol();