===================================================================
RCS file: /cvs/mandoc/eqn_term.c,v
retrieving revision 1.15
retrieving revision 1.16
diff -u -p -r1.15 -r1.16
--- mandoc/eqn_term.c	2017/08/23 20:29:42	1.15
+++ mandoc/eqn_term.c	2017/08/23 20:49:15	1.16
@@ -1,4 +1,4 @@
-/*	$Id: eqn_term.c,v 1.15 2017/08/23 20:29:42 schwarze Exp $ */
+/*	$Id: eqn_term.c,v 1.16 2017/08/23 20:49:15 schwarze Exp $ */
 /*
  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -52,6 +52,7 @@ static void
 eqn_box(struct termp *p, const struct eqn_box *bp)
 {
 	const struct eqn_box *child;
+	const char *cp;
 	int delim;
 
 	/* Delimiters around this box? */
@@ -94,8 +95,9 @@ eqn_box(struct termp *p, const struct eqn_box *bp)
 		if (strchr("!\"'),.:;?]}", *bp->text) != NULL)
 			p->flags |= TERMP_NOSPACE;
 		term_word(p, bp->text);
-		if (*bp->text != '\0' && strchr("\"'([{",
-		    bp->text[strlen(bp->text) - 1]) != NULL)
+		if ((cp = strchr(bp->text, '\0')) > bp->text &&
+		    ((cp[-1] == '-' && bp->prev == NULL) ||
+		     strchr("\"'([{", cp[-1]) != NULL))
 			p->flags |= TERMP_NOSPACE;
 	}