diff --git a/modules/tile_map/tile_map.h b/modules/tile_map/tile_map.h
index bf8a765d7..12a0d6bb6 100644
--- a/modules/tile_map/tile_map.h
+++ b/modules/tile_map/tile_map.h
@@ -350,6 +350,7 @@ public:
 	void set_centered_textures(bool p_enable);
 	bool is_centered_textures_enabled() const;
 
+	// TODO change these to PoolVector2iArrays
 	Array get_used_cells() const;
 	Array get_used_cells_by_id(int p_id) const;
 	Rect2 get_used_rect(); // Not const because of cache