diff --git a/src/ol/source/vectortile.js b/src/ol/source/vectortile.js
index 6402ee31c1..906ab6f0ff 100644
--- a/src/ol/source/vectortile.js
+++ b/src/ol/source/vectortile.js
@@ -103,6 +103,7 @@ ol.source.VectorTile.prototype.getOverlaps = function() {
 
 /**
  * clear {@link ol.TileCache} and delete all source tiles
+ * @api
  */
 ol.source.VectorTile.prototype.clear = function() {
   this.tileCache.clear();