1 files changed, 6 insertions, 3 deletions
diff --git a/eqn_html.c b/eqn_html.c
index f4b77d95..9010544c 100644
--- a/eqn_html.c
+++ b/eqn_html.c
@@ -51,7 +51,8 @@ eqn_box(struct html *p, const struct eqn_box *bp)
 	if (EQN_MATRIX == bp->type) {
 		if (NULL == bp->first)
 			goto out;
-		if (EQN_LIST != bp->first->type) {
+		if (bp->first->type != EQN_LIST ||
+		    bp->first->expectargs == 1) {
 			eqn_box(p, bp->first);
 			goto out;
 		}
@@ -131,9 +132,11 @@ eqn_box(struct html *p, const struct eqn_box *bp)
 
 	if (EQN_PILE == bp->type) {
 		assert(NULL == post);
-		if (bp->first != NULL && bp->first->type == EQN_LIST)
+		if (bp->first != NULL &&
+		    bp->first->type == EQN_LIST &&
+		    bp->first->expectargs > 1)
 			post = print_otag(p, TAG_MTABLE, "");
-	} else if (bp->type == EQN_LIST &&
+	} else if (bp->type == EQN_LIST && bp->expectargs > 1 &&
 	    bp->parent && bp->parent->type == EQN_PILE) {
 		assert(NULL == post);
 		post = print_otag(p, TAG_MTR, "");