1 files changed, 4 insertions, 1 deletions
diff --git a/eqn_html.c b/eqn_html.c
index f569ec2a..51f14423 100644
--- a/eqn_html.c
+++ b/eqn_html.c
@@ -1,4 +1,4 @@
-/*	$Id: eqn_html.c,v 1.16 2017/07/08 14:51:04 schwarze Exp $ */
+/*	$Id: eqn_html.c,v 1.17 2017/07/14 13:32:35 schwarze Exp $ */
 /*
  * Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -231,6 +231,9 @@ print_eqn(struct html *p, const struct eqn_box *bp)
 {
 	struct tag	*t;
 
+	if (bp->first == NULL)
+		return;
+
 	t = print_otag(p, TAG_MATH, "c", "eqn");
 
 	p->flags |= HTML_NONOSPACE;