--- ray/src/px/pvalue.c	1989/09/12 13:04:30	1.2
+++ ray/src/px/pvalue.c	1990/01/05 17:52:54	1.3
@@ -158,8 +158,8 @@ char  *line;
 {
 	if (header)
 		fputs(line, stdout);
-	if (!strncmp(line, "EXPOSURE=", 9))
-		exposure *= atof(line+9);
+	if (isexpos(line))
+		exposure *= exposval(line);
 }