diff --git a/src/insexpand.c b/src/insexpand.c
index bd809b0..6963baf 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -2334,7 +2334,7 @@
     int		dir = compl_direction;
 
     // Go through the List with matches and add each of them.
-    range_list_materialize(list);
+    CHECK_LIST_MATERIALIZE(list);
     FOR_ALL_LIST_ITEMS(list, li)
     {
 	if (ins_compl_add_tv(&li->li_tv, dir) == OK)
@@ -2519,7 +2519,7 @@
     else
     {
 	what_flag = 0;
-	range_list_materialize(what_list);
+	CHECK_LIST_MATERIALIZE(what_list);
 	FOR_ALL_LIST_ITEMS(what_list, item)
 	{
 	    char_u *what = tv_get_string(&item->li_tv);