diff --git a/src/Skobkin/Bundle/CopyPasteBundle/Entity/Copypaste.php b/src/Skobkin/Bundle/CopyPasteBundle/Entity/Copypaste.php
index 071be71..331e3f2 100644
--- a/src/Skobkin/Bundle/CopyPasteBundle/Entity/Copypaste.php
+++ b/src/Skobkin/Bundle/CopyPasteBundle/Entity/Copypaste.php
@@ -110,7 +110,7 @@ class Copypaste
     
     public function __toString()
     {
-        return $this->id;
+        return (string) $this->id;
     }
 
     /**