diff --git a/core/extensions.md b/core/extensions.md
index 9d06acc282d..258d37cbac7 100644
--- a/core/extensions.md
+++ b/core/extensions.md
@@ -77,12 +77,12 @@ final readonly class CurrentUserExtension implements QueryCollectionExtensionInt
     {
     }
 
-    public function applyToCollection(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, Operation $operation = null, array $context = []): void
+    public function applyToCollection(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, ?Operation $operation = null, array $context = []): void
     {
         $this->addWhere($queryBuilder, $resourceClass);
     }
 
-    public function applyToItem(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, array $identifiers, Operation $operation = null, array $context = []): void
+    public function applyToItem(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, array $identifiers, ?Operation $operation = null, array $context = []): void
     {
         $this->addWhere($queryBuilder, $resourceClass);
     }