diff --git a/src/Error/ErrorHandler.php b/src/Error/ErrorHandler.php
index 480ddd9fd27..962ef9f40e2 100644
--- a/src/Error/ErrorHandler.php
+++ b/src/Error/ErrorHandler.php
@@ -101,7 +101,7 @@ public function __construct($options = []) {
 			'trace' => false,
 			'exceptionRenderer' => 'Cake\Error\ExceptionRenderer',
 		];
-		$this->_options = array_merge($defaults, $options);
+		$this->_options = $options + $defaults;
 	}
 
 /**