1 files changed, 2 insertions, 1 deletions
diff --git a/read.c b/read.c
index 86416f70..2bc6b844 100644
--- a/read.c
+++ b/read.c
@@ -1,4 +1,4 @@
-/*	$Id: read.c,v 1.179 2017/06/24 14:38:33 schwarze Exp $ */
+/*	$Id: read.c,v 1.180 2017/06/24 15:59:50 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -90,6 +90,7 @@ static	const char * const	mandocerrs[MANDOCERR_MAX] = {
 
 	"Mdocdate found",
 	"Mdocdate missing",
+	"operating system explicitly specified",
 	"RCS id missing",
 
 	"generic style suggestion",