diff --git a/trunk/src/AppBundle/Entity/Traveler.php b/trunk/src/AppBundle/Entity/Traveler.php
index ad2038a9..83733b61 100644
--- a/trunk/src/AppBundle/Entity/Traveler.php
+++ b/trunk/src/AppBundle/Entity/Traveler.php
@@ -88,7 +88,7 @@ class Traveler
      */
     public function getBirthDate()
     {
-        if(($this->birthDate instanceof String) && !strtotime($this->birthDate)){
+        if(!is_object($this->birthDate) && !strtotime($this->birthDate)){
             return '01.01.1900';
         }
         return $this->birthDate;