diff --git a/src/ol/format/XLink.js b/src/ol/format/XLink.js
index 8688388c81..bdff91dbd4 100644
--- a/src/ol/format/XLink.js
+++ b/src/ol/format/XLink.js
@@ -12,7 +12,7 @@ const NAMESPACE_URI = 'http://www.w3.org/1999/xlink';
 
 /**
  * @param {Node} node Node.
- * @return {boolean|undefined} Boolean.
+ * @return {string|undefined} href.
  */
 export function readHref(node) {
   return node.getAttributeNS(NAMESPACE_URI, 'href');