diff --git a/lib/events.js b/lib/events.js
index 7103ec393fca73..f0881fef470310 100644
--- a/lib/events.js
+++ b/lib/events.js
@@ -437,12 +437,7 @@ function listenerCount(type) {
 }
 
 EventEmitter.prototype.eventNames = function eventNames() {
-  if (this._eventsCount > 0) {
-    const events = this._events;
-    return Object.keys(events).concat(
-      Object.getOwnPropertySymbols(events));
-  }
-  return [];
+  return this._eventsCount > 0 ? Reflect.ownKeys(this._events) : [];
 };
 
 // About 1.5x faster than the two-arg version of Array#splice().