diff --git a/lib/EntryModuleNotFoundError.js b/lib/EntryModuleNotFoundError.js
index 3c7b619873c..379f8346b8c 100644
--- a/lib/EntryModuleNotFoundError.js
+++ b/lib/EntryModuleNotFoundError.js
@@ -2,15 +2,17 @@
 	MIT License http://www.opensource.org/licenses/mit-license.php
 	Author Tobias Koppers @sokra
 */
-function EntryModuleNotFoundError(err) {
-	Error.call(this);
-	this.name = "EntryModuleNotFoundError";
-	this.message = "Entry module not found: " + err;
-	this.details = err.details;
-	this.error = err;
-	Error.captureStackTrace(this, EntryModuleNotFoundError);
+"use strict";
+
+class EntryModuleNotFoundError extends Error {
+	constructor(err) {
+		super();
+		this.name = "EntryModuleNotFoundError";
+		this.message = "Entry module not found: " + err;
+		this.details = err.details;
+		this.error = err;
+		Error.captureStackTrace(this, EntryModuleNotFoundError);
+	}
 }
-module.exports = EntryModuleNotFoundError;
 
-EntryModuleNotFoundError.prototype = Object.create(Error.prototype);
-EntryModuleNotFoundError.prototype.constructor = EntryModuleNotFoundError;
+module.exports = EntryModuleNotFoundError;