diff --git a/externs/olx.js b/externs/olx.js
index 568a8cf13b..b2f385e474 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -863,80 +863,6 @@ olx.source.StamenOptions.prototype.url;
 olx.source.StamenOptions.prototype.wrapX;
 
 
-/**
- * @typedef {{attributions: (ol.AttributionLike|undefined),
- *     crossOrigin: (null|string|undefined),
- *     imageExtent: (ol.Extent),
- *     imageLoadFunction: (ol.ImageLoadFunctionType|undefined),
- *     imageSize: (ol.Size|undefined),
- *     projection: ol.ProjectionLike,
- *     url: string}}
- */
-olx.source.ImageStaticOptions;
-
-
-/**
- * Attributions.
- * @type {ol.AttributionLike|undefined}
- * @api
- */
-olx.source.ImageStaticOptions.prototype.attributions;
-
-
-/**
- * The `crossOrigin` attribute for loaded images.  Note that you must provide a
- * `crossOrigin` value if you are using the WebGL renderer or if you want to
- * access pixel data with the Canvas renderer.  See
- * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image}
- * for more detail.
- * @type {null|string|undefined}
- * @api
- */
-olx.source.ImageStaticOptions.prototype.crossOrigin;
-
-
-/**
- * Extent of the image in map coordinates.  This is the [left, bottom, right,
- * top] map coordinates of your image.
- * @type {ol.Extent}
- * @api
- */
-olx.source.ImageStaticOptions.prototype.imageExtent;
-
-
-/**
- * Optional function to load an image given a URL.
- * @type {ol.ImageLoadFunctionType|undefined}
- * @api
- */
-olx.source.ImageStaticOptions.prototype.imageLoadFunction;
-
-
-/**
- * Projection.
- * @type {ol.ProjectionLike}
- * @api
- */
-olx.source.ImageStaticOptions.prototype.projection;
-
-
-/**
- * Size of the image in pixels. Usually the image size is auto-detected, so this
- * only needs to be set if auto-detection fails for some reason.
- * @type {ol.Size|undefined}
- * @api
- */
-olx.source.ImageStaticOptions.prototype.imageSize;
-
-
-/**
- * Image URL.
- * @type {string}
- * @api
- */
-olx.source.ImageStaticOptions.prototype.url;
-
-
 /**
  * @typedef {{attributions: (ol.AttributionLike|undefined),
  *     cacheSize: (number|undefined),
diff --git a/src/ol/source/ImageStatic.js b/src/ol/source/ImageStatic.js
index 088acdbab6..de12dd33d9 100644
--- a/src/ol/source/ImageStatic.js
+++ b/src/ol/source/ImageStatic.js
@@ -11,13 +11,30 @@ import {intersects, getHeight, getWidth} from '../extent.js';
 import {get as getProjection} from '../proj.js';
 import ImageSource, {defaultImageLoadFunction} from '../source/Image.js';
 
+/**
+ * @typedef {Object} Options
+ * @property {ol.AttributionLike} [attributions] Attributions.
+ * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that
+ * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to
+ * access pixel data with the Canvas renderer.  See
+ * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.
+ * @property {ol.Extent} [imageExtent] Extent of the image in map coordinates.
+ * This is the [left, bottom, right, top] map coordinates of your image.
+ * @property {ol.ImageLoadFunctionType} [imageLoadFunction] Optional function to load an image given a URL.
+ * @property {ol.ProjectionLike} projection Projection.
+ * @property {ol.Size} [imageSize] Size of the image in pixels. Usually the image size is auto-detected, so this
+ * only needs to be set if auto-detection fails for some reason.
+ * @property {string} url Image URL.
+ */
+
+
 /**
  * @classdesc
  * A layer source for displaying a single, static image.
  *
  * @constructor
  * @extends {ol.source.Image}
- * @param {olx.source.ImageStaticOptions} options Options.
+ * @param {module:ol/source/ImageStatic~Options=} options ImageStatic options.
  * @api
  */
 const Static = function(options) {