diff --git a/src/ol/source/TileWMS.js b/src/ol/source/TileWMS.js
index 8734d61519..9df80f92e7 100644
--- a/src/ol/source/TileWMS.js
+++ b/src/ol/source/TileWMS.js
@@ -20,6 +20,7 @@ import {hash as tileCoordHash} from '../tilecoord.js';
 /**
  * @typedef {Object} Options
  * @property {import("./Source.js").AttributionLike} [attributions] Attributions.
+ * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.
  * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.
  * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that
  * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.
@@ -88,6 +89,7 @@ class TileWMS extends TileImage {
 
     super({
       attributions: options.attributions,
+      attributionsCollapsible: options.attributionsCollapsible,
       cacheSize: options.cacheSize,
       crossOrigin: options.crossOrigin,
       imageSmoothing: options.imageSmoothing,
diff --git a/src/ol/source/WMTS.js b/src/ol/source/WMTS.js
index 68ece7ba05..6be8f651cc 100644
--- a/src/ol/source/WMTS.js
+++ b/src/ol/source/WMTS.js
@@ -15,6 +15,7 @@ import {find, findIndex, includes} from '../array.js';
 /**
  * @typedef {Object} Options
  * @property {import("./Source.js").AttributionLike} [attributions] Attributions.
+ * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.
  * @property {number} [cacheSize] Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.
  * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that
  * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.
@@ -83,6 +84,7 @@ class WMTS extends TileImage {
 
     super({
       attributions: options.attributions,
+      attributionsCollapsible: options.attributionsCollapsible,
       cacheSize: options.cacheSize,
       crossOrigin: options.crossOrigin,
       imageSmoothing: options.imageSmoothing,