diff --git a/Exception/FlattenException.php b/Exception/FlattenException.php
index e401657..a4cb517 100644
--- a/Exception/FlattenException.php
+++ b/Exception/FlattenException.php
@@ -180,7 +180,7 @@ public function getMessage()
     public function setMessage($message)
     {
         if (false !== strpos($message, "class@anonymous\0")) {
-            $message = preg_replace_callback('/class@anonymous\x00.*?\.php(?:0x?|:)[0-9a-fA-F]++/', function ($m) {
+            $message = preg_replace_callback('/class@anonymous\x00.*?\.php(?:0x?|:[0-9]++\$)[0-9a-fA-F]++/', function ($m) {
                 return class_exists($m[0], false) ? get_parent_class($m[0]).'@anonymous' : $m[0];
             }, $message);
         }