===================================================================
RCS file: /cvs/mandoc/read.c,v
retrieving revision 1.177
retrieving revision 1.178
diff -u -p -r1.177 -r1.178
--- mandoc/read.c	2017/06/17 22:43:14	1.177
+++ mandoc/read.c	2017/06/17 23:07:00	1.178
@@ -1,4 +1,4 @@
-/*	$Id: read.c,v 1.177 2017/06/17 22:43:14 schwarze Exp $ */
+/*	$Id: read.c,v 1.178 2017/06/17 23:07:00 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -92,6 +92,7 @@ static	const char * const	mandocerrs[MANDOCERR_MAX] = 
 	"Mdocdate missing",
 	"legacy man(7) date format",
 	"RCS id missing",
+	"duplicate RCS id",
 	"useless macro",
 	"consider using OS macro",
 	"errnos out of order",