diff --git a/Mplusqapiclient.php b/Mplusqapiclient.php
index 3dca548..a7c3847 100755
--- a/Mplusqapiclient.php
+++ b/Mplusqapiclient.php
@@ -6557,7 +6557,7 @@ public function convertButtonLayoutRequest($terminal)
 
 //------------------------------------------------------------------------------
 
-if ( ! class_exists('MplusQAPIException')) {
+if ( ! class_exists('MplusQAPIException', false)) {
   class MplusQAPIException extends Exception
   {