diff --git a/code_samples/back_office/limitation/src/Security/Limitation/CustomLimitationType.php b/code_samples/back_office/limitation/src/Security/Limitation/CustomLimitationType.php
index acb7c5f9df..06030e605a 100644
--- a/code_samples/back_office/limitation/src/Security/Limitation/CustomLimitationType.php
+++ b/code_samples/back_office/limitation/src/Security/Limitation/CustomLimitationType.php
@@ -76,7 +76,7 @@ public function getCriterion(Limitation $value, UserReference $currentUser): Cri
         throw new NotImplementedException(__METHOD__);
     }
 
-    public function valueSchema()
+    public function valueSchema(): never
     {
         throw new NotImplementedException(__METHOD__);
     }