diff --git a/src/ol/tilegrid/tilegrid.js b/src/ol/tilegrid/tilegrid.js
index a91a78fc02..e24e8e02b4 100644
--- a/src/ol/tilegrid/tilegrid.js
+++ b/src/ol/tilegrid/tilegrid.js
@@ -305,6 +305,7 @@ ol.tilegrid.TileGrid.prototype.getTileCoordExtent =
  * @param {number} resolution Resolution.
  * @param {ol.TileCoord=} opt_tileCoord Destination ol.TileCoord object.
  * @return {ol.TileCoord} Tile coordinate.
+ * @api
  */
 ol.tilegrid.TileGrid.prototype.getTileCoordForCoordAndResolution = function(
     coordinate, resolution, opt_tileCoord) {
@@ -351,6 +352,7 @@ ol.tilegrid.TileGrid.prototype.getTileCoordForXYAndResolution_ = function(
  * @param {number} z Z.
  * @param {ol.TileCoord=} opt_tileCoord Destination ol.TileCoord object.
  * @return {ol.TileCoord} Tile coordinate.
+ * @api
  */
 ol.tilegrid.TileGrid.prototype.getTileCoordForCoordAndZ =
     function(coordinate, z, opt_tileCoord) {