diff --git a/src/Raygun4php/RaygunExceptionMessage.php b/src/Raygun4php/RaygunExceptionMessage.php
index 6185f0c..01217d8 100644
--- a/src/Raygun4php/RaygunExceptionMessage.php
+++ b/src/Raygun4php/RaygunExceptionMessage.php
@@ -19,6 +19,7 @@ public function __construct($exception)
             {
                 $this->Message = $exceptionClass.': '.$exception->getMessage();
                 $this->BuildStackTrace($exception);
+                $this->ClassName = $exceptionClass;
             }
             else
             {