diff --git a/externs/olx.js b/externs/olx.js
index ee4025f22b..15afe4bd68 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -3521,36 +3521,3 @@ olx.tilegrid.XYZOptions.prototype.minZoom;
  * @api
  */
 olx.tilegrid.XYZOptions.prototype.tileSize;
-
-
-/**
- * @typedef {{initialSize: (number|undefined),
- *     maxSize: (number|undefined),
- *     space: (number|undefined)}}
- */
-olx.style.AtlasManagerOptions;
-
-
-/**
- * The size in pixels of the first atlas image. Default is `256`.
- * @type {number|undefined}
- * @api
- */
-olx.style.AtlasManagerOptions.prototype.initialSize;
-
-
-/**
- * The maximum size in pixels of atlas images. Default is
- * `WEBGL_MAX_TEXTURE_SIZE` or 2048 if WebGL is not supported.
- * @type {number|undefined}
- * @api
- */
-olx.style.AtlasManagerOptions.prototype.maxSize;
-
-
-/**
- * The space in pixels between images (default: 1).
- * @type {number|undefined}
- * @api
- */
-olx.style.AtlasManagerOptions.prototype.space;
diff --git a/src/ol/style/AtlasManager.js b/src/ol/style/AtlasManager.js
index e61f2b1da4..bd4297acdc 100644
--- a/src/ol/style/AtlasManager.js
+++ b/src/ol/style/AtlasManager.js
@@ -6,6 +6,15 @@ import {UNDEFINED} from '../functions.js';
 import Atlas from '../style/Atlas.js';
 
 
+/**
+ * @typedef {Object} Options
+ * @property {number} [initialSize=256] The size in pixels of the first atlas image.
+ * @property {number} [maxSize] The maximum size in pixels of atlas images. Default is
+ * `WEBGL_MAX_TEXTURE_SIZE` or 2048 if WebGL is not supported.
+ * @property {number} [space=1] The space in pixels between images.
+ */
+
+
 /**
  * Provides information for an image inside an atlas manager.
  * `offsetX` and `offsetY` is the position of the image inside
@@ -47,7 +56,7 @@ const MAX_ATLAS_SIZE = -1;
  * @constructor
  * @struct
  * @api
- * @param {olx.style.AtlasManagerOptions=} opt_options Options.
+ * @param {module:ol/style/AtlasManager~Options=} opt_options Options.
  */
 const AtlasManager = function(opt_options) {