===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/look/look.c,v
retrieving revision 1.19
retrieving revision 1.20
diff -u -r1.19 -r1.20
--- src/usr.bin/look/look.c	2016/09/13 15:27:47	1.19
+++ src/usr.bin/look/look.c	2017/01/21 08:51:00	1.20
@@ -1,4 +1,4 @@
-/*	$OpenBSD: look.c,v 1.19 2016/09/13 15:27:47 millert Exp $	*/
+/*	$OpenBSD: look.c,v 1.20 2017/01/21 08:51:00 krw Exp $	*/
 /*	$NetBSD: look.c,v 1.7 1995/08/31 22:41:02 jtc Exp $	*/
 
 /*-
@@ -134,7 +134,7 @@
 	char *readp, *writep;
 
 	/* Reformat string to avoid doing it multiple times later. */
-	for (readp = writep = string; ch = *readp++;) {
+	for (readp = writep = string; (ch = *readp++);) {
 		if (fflag)
 			ch = tolower((unsigned char)ch);
 		if (!dflag || isalnum((unsigned char)ch))