diff --git a/lib/internal/abort_controller.js b/lib/internal/abort_controller.js
index b0d9074a050da9..93df3b5fb6f0b1 100644
--- a/lib/internal/abort_controller.js
+++ b/lib/internal/abort_controller.js
@@ -186,9 +186,7 @@ class AbortSignal extends EventTarget {
    * @returns {AbortSignal}
    */
   static abort(reason) {
-    if (reason === undefined) {
-      reason = lazyDOMException();
-    }
+    reason ??= lazyDOMException();
     return createAbortSignal({ aborted: true, reason });
   }
 
@@ -350,9 +348,7 @@ class AbortController {
    * @param {any} [reason]
    */
   abort(reason) {
-    if (reason === undefined) {
-      reason = lazyDOMException();
-    }
+    reason ??= lazyDOMException();
     abortSignal(this.#signal ??= createAbortSignal(), reason);
   }