diff --git a/src/window.c b/src/window.c
index 609ab3e..ec286c7 100644
--- a/src/window.c
+++ b/src/window.c
@@ -6943,13 +6943,14 @@
  * Return ID of added match, -1 on failure.
  */
     int
-match_add(wp, grp, pat, prio, id, pos_list)
+match_add(wp, grp, pat, prio, id, pos_list, conceal_char)
     win_T	*wp;
     char_u	*grp;
     char_u	*pat;
     int		prio;
     int		id;
     list_T	*pos_list;
+    char_u      *conceal_char UNUSED; /* pointer to conceal replacement char */
 {
     matchitem_T	*cur;
     matchitem_T	*prev;
@@ -7009,6 +7010,11 @@
     m->match.regprog = regprog;
     m->match.rmm_ic = FALSE;
     m->match.rmm_maxcol = 0;
+#ifdef FEAT_CONCEAL
+    m->conceal_char = 0;
+    if (conceal_char != NULL)
+	m->conceal_char = (*mb_ptr2char)(conceal_char);
+#endif
 
     /* Set up position matches */
     if (pos_list != NULL)