--- ray/src/rt/rv2.c	1992/12/11 17:56:22	2.14
+++ ray/src/rt/rv2.c	1993/03/08 12:37:35	2.15
@@ -287,7 +287,7 @@ char  *s;
 			for (cp++; isspace(*cp); cp++)
 				;
 			if (*cp == '\0') {	/* interactive */
-				sprintf(buf, "exposure (%lf): ", exposure);
+				sprintf(buf, "exposure (%f): ", exposure);
 				(*dev->comout)(buf);
 				(*dev->comin)(buf, NULL);
 				for (cp = buf; isspace(*cp); cp++)