diff --git a/config/bootstrap.php b/config/bootstrap.php
index 4b48876..203ff7d 100644
--- a/config/bootstrap.php
+++ b/config/bootstrap.php
@@ -15,7 +15,7 @@
 
 Configure::write('Cors', $config);
 
-if ($config['exceptionRenderer']) {
+if ($config['exceptionRenderer'] && Configure::read('Error.exceptionRenderer') != $config['exceptionRenderer']) {
     Configure::write('Error.baseExceptionRenderer', Configure::read('Error.exceptionRenderer'));
     Configure::write('Error.exceptionRenderer', $config['exceptionRenderer']);
 }