===================================================================
RCS file: /cvs/mandoc/tbl_term.c,v
retrieving revision 1.30
retrieving revision 1.31
diff -u -p -r1.30 -r1.31
--- mandoc/tbl_term.c	2014/10/14 02:16:06	1.30
+++ mandoc/tbl_term.c	2014/10/14 18:18:05	1.31
@@ -1,4 +1,4 @@
-/*	$Id: tbl_term.c,v 1.30 2014/10/14 02:16:06 schwarze Exp $ */
+/*	$Id: tbl_term.c,v 1.31 2014/10/14 18:18:05 schwarze Exp $ */
 /*
  * Copyright (c) 2009, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2011, 2012, 2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -107,7 +107,7 @@ term_tbl(struct termp *tp, const struct tbl_span *sp)
 	/* Vertical frame at the start of each row. */
 
 	if ((TBL_OPT_BOX | TBL_OPT_DBOX) & sp->opts->opts ||
-	    sp->head->vert)
+	    (sp->head != NULL && sp->head->vert))
 		term_word(tp, TBL_SPAN_HORIZ == sp->pos ||
 		    TBL_SPAN_DHORIZ == sp->pos ? "+" : "|");