diff --git a/src/ol/has.js b/src/ol/has.js
index ed05a84f85..1c6b36a7f5 100644
--- a/src/ol/has.js
+++ b/src/ol/has.js
@@ -127,6 +127,7 @@ ol.has.WEBGL;
  * supported, the value is set to `-1`.
  * @const
  * @type {number}
+ * @api
  */
 ol.has.WEBGL_MAX_TEXTURE_SIZE;