diff --git a/src/ol/format/WMSCapabilities.js b/src/ol/format/WMSCapabilities.js
index 5e49906fae..1cb7a19c3b 100644
--- a/src/ol/format/WMSCapabilities.js
+++ b/src/ol/format/WMSCapabilities.js
@@ -1,7 +1,6 @@
 /**
  * @module ol/format/WMSCapabilities
  */
-import {inherits} from '../util.js';
 import {readHref} from '../format/XLink.js';
 import XML from '../format/XML.js';
 import {readDecimalString, readString, readNonNegativeInteger, readDecimal, readBooleanString, readNonNegativeIntegerString} from '../format/xsd.js';
@@ -46,13 +45,11 @@ const CAPABILITY_PARSERS = makeStructureNS(
  * @classdesc
  * Format for reading WMS capabilities data
  *
- * @extends {module:ol/format/XML}
  * @api
  */
-class WMSCapabilities {
+class WMSCapabilities extends XML {
   constructor() {
-
-    XML.call(this);
+    super();
 
     /**
      * @type {string|undefined}
@@ -84,8 +81,6 @@ class WMSCapabilities {
   }
 }
 
-inherits(WMSCapabilities, XML);
-
 
 /**
  * @const
@@ -290,17 +285,6 @@ const KEYWORDLIST_PARSERS = makeStructureNS(
   });
 
 
-/**
- * Read a WMS capabilities document.
- *
- * @function
- * @param {Document|Node|string} source The XML source.
- * @return {Object} An object representing the WMS capabilities.
- * @api
- */
-WMSCapabilities.prototype.read;
-
-
 /**
  * @param {Node} node Node.
  * @param {Array.<*>} objectStack Object stack.
diff --git a/src/ol/format/XML.js b/src/ol/format/XML.js
index d210640b32..a61f580e11 100644
--- a/src/ol/format/XML.js
+++ b/src/ol/format/XML.js
@@ -11,8 +11,11 @@ import {isDocument, isNode, parse} from '../xml.js';
  */
 class XML {
   /**
-   * @param {Document|Node|string} source Source.
-   * @return {Object} The parsed result.
+   * Read the source document.
+   *
+   * @param {Document|Node|string} source The XML source.
+   * @return {Object} An object representing the source.
+   * @api
    */
   read(source) {
     if (isDocument(source)) {