diff --git a/src/room_util.c b/src/room_util.c
index 3f395674aa..03aeb1b95d 100644
--- a/src/room_util.c
+++ b/src/room_util.c
@@ -332,6 +332,7 @@ TbBool replace_slab_from_script(MapSlabCoord slb_x, MapSlabCoord slb_y, unsigned
     SYNCDBG(7, "Room on (%d,%d) had %d slabs", (int)slb_x, (int)slb_y, (int)room->slabs_count);
     decrease_room_area(room->owner, 1);
     kill_room_slab_and_contents(room->owner, slb_x, slb_y);
+    remove_slab_from_room_tiles_list(room, slb_x, slb_y);
     if (room->slabs_count <= 1)
     {
         delete_room_flag(room);