===================================================================
RCS file: /cvs/mandoc/mdoc_man.c,v
retrieving revision 1.129
retrieving revision 1.130
diff -u -p -r1.129 -r1.130
--- mandoc/mdoc_man.c	2018/12/03 21:00:10	1.129
+++ mandoc/mdoc_man.c	2018/12/15 19:30:26	1.130
@@ -1,4 +1,4 @@
-/*	$Id: mdoc_man.c,v 1.129 2018/12/03 21:00:10 schwarze Exp $ */
+/*	$Id: mdoc_man.c,v 1.130 2018/12/15 19:30:26 schwarze Exp $ */
 /*
  * Copyright (c) 2011-2018 Ingo Schwarze <schwarze@openbsd.org>
  *
@@ -325,6 +325,7 @@ man_strlen(const char *cp)
 		case ESCAPE_UNICODE:
 		case ESCAPE_NUMBERED:
 		case ESCAPE_SPECIAL:
+		case ESCAPE_UNDEF:
 		case ESCAPE_OVERSTRIKE:
 			if (skip)
 				skip = 0;