===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/mandoc/html.c,v
retrieving revision 1.87
retrieving revision 1.88
diff -u -r1.87 -r1.88
--- src/usr.bin/mandoc/html.c	2017/07/14 16:05:52	1.87
+++ src/usr.bin/mandoc/html.c	2017/07/14 16:28:35	1.88
@@ -1,4 +1,4 @@
-/*	$OpenBSD: html.c,v 1.87 2017/07/14 16:05:52 schwarze Exp $ */
+/*	$OpenBSD: html.c,v 1.88 2017/07/14 16:28:35 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2011-2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -622,8 +622,13 @@
 			su = va_arg(ap, struct roffsu *);
 			break;
 		case 'w':
-			if ((arg2 = va_arg(ap, char *)) == NULL)
+			if ((arg2 = va_arg(ap, char *)) == NULL) {
+				if (*fmt == '+')
+					fmt++;
+				if (*fmt == '-')
+					fmt++;
 				break;
+			}
 			su = &mysu;
 			a2width(arg2, su);
 			if (*fmt == '+') {