diff --git a/lib/Doctrine/EntityTraits/AutoincrementedIdTrait.php b/lib/Doctrine/EntityTraits/AutoincrementedIdTrait.php
index fb7c1f60b2..d91cb2d50e 100644
--- a/lib/Doctrine/EntityTraits/AutoincrementedIdTrait.php
+++ b/lib/Doctrine/EntityTraits/AutoincrementedIdTrait.php
@@ -13,7 +13,7 @@ trait AutoincrementedIdTrait {
    */
   private $id;
 
-  /** @return int */
+  /** @return int|null */
   public function getId() {
     return $this->id;
   }