diff --git a/doc/api/globals.md b/doc/api/globals.md
index ec42fd53ab24eb..a9a6348264acb8 100644
--- a/doc/api/globals.md
+++ b/doc/api/globals.md
@@ -43,7 +43,7 @@ ac.signal.addEventListener('abort', () => console.log('Aborted!'),
 
 ac.abort();
 
-console.log(ac.signal.aborted);  // Prints True
+console.log(ac.signal.aborted);  // Prints true
 ```
 
 ### `abortController.abort([reason])`
@@ -196,7 +196,7 @@ An optional reason specified when the `AbortSignal` was triggered.
 ```js
 const ac = new AbortController();
 ac.abort(new Error('boom!'));
-console.log(ac.signal.reason);  // Error('boom!');
+console.log(ac.signal.reason);  // Error: boom!
 ```
 
 #### `abortSignal.throwIfAborted()`
diff --git a/lib/internal/abort_controller.js b/lib/internal/abort_controller.js
index 847d9db6699d75..2c1f43354f9f7c 100644
--- a/lib/internal/abort_controller.js
+++ b/lib/internal/abort_controller.js
@@ -163,7 +163,7 @@ class AbortSignal extends EventTarget {
   }
 
   /**
-   * @param {any} reason
+   * @param {any} [reason]
    * @returns {AbortSignal}
    */
   static abort(
@@ -326,7 +326,7 @@ class AbortController {
   }
 
   /**
-   * @param {any} reason
+   * @param {any} [reason]
    */
   abort(reason = new DOMException('This operation was aborted', 'AbortError')) {
     abortSignal(this.#signal ??= createAbortSignal(), reason);