diff --git a/src/Bundle/ChillAsideActivityBundle/src/Entity/AsideActivity.php b/src/Bundle/ChillAsideActivityBundle/src/Entity/AsideActivity.php
index e6adfe5a6..3a22ae384 100644
--- a/src/Bundle/ChillAsideActivityBundle/src/Entity/AsideActivity.php
+++ b/src/Bundle/ChillAsideActivityBundle/src/Entity/AsideActivity.php
@@ -15,7 +15,7 @@ class AsideActivity
      * @ORM\GeneratedValue
      * @ORM\Column(type="integer")
      */
-    private $id;
+    private ?int $id;
 
     /**
      * @ORM\ManyToOne(targetEntity=AsideActivityCategory::class, inversedBy="asideActivities")