diff --git a/lib/fs.js b/lib/fs.js
index 66d7aa73ffef03..85f546e88799ec 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -2923,7 +2923,7 @@ function mkdtemp(prefix, options, callback) {
 
 /**
  * Synchronously creates a unique temporary directory.
- * @param {string} prefix
+ * @param {string | Buffer | URL} prefix
  * @param {string | { encoding?: string; }} [options]
  * @returns {string}
  */