diff --git a/src/Api/Controller/AbstractSerializeController.php b/src/Api/Controller/AbstractSerializeController.php
index afa788490..5bcdfb274 100644
--- a/src/Api/Controller/AbstractSerializeController.php
+++ b/src/Api/Controller/AbstractSerializeController.php
@@ -186,7 +186,7 @@ abstract class AbstractSerializeController implements ControllerInterface
      */
     protected function extractFilter(ServerRequestInterface $request)
     {
-        return $this->buildParameters($request)->getFilter();
+        return $this->buildParameters($request)->getFilter() ?: [];
     }
 
     /**