diff --git a/src/Unstable/ResourceResponseFactory.php b/src/Unstable/ResourceResponseFactory.php
index 1e9bde2..53cc436 100644
--- a/src/Unstable/ResourceResponseFactory.php
+++ b/src/Unstable/ResourceResponseFactory.php
@@ -14,6 +14,7 @@ use Drupal\jsonapi\JsonApiResource\ResourceObject;
 use Drupal\jsonapi\JsonApiResource\ResourceObjectData;
 use Drupal\jsonapi\ResourceResponse;
 use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 
 /**
  * Creates JSON:API response objects.
@@ -99,9 +100,20 @@ final class ResourceResponseFactory {
    */
   private function getIncludes(Request $request, $data): IncludedData {
     assert($data instanceof ResourceObject || $data instanceof ResourceObjectData);
-    return $request->query->has('include') && ($include_parameter = $request->query->get('include')) && !empty($include_parameter)
-      ? $this->includeResolver->resolve($data, $include_parameter)
-      : new NullIncludedData();
+    $includes = new NullIncludedData();
+    if ($request->query->has('include') && ($include_parameter = $request->query->get('include')) && !empty($include_parameter)) {
+      foreach ($data->getData() as $entity) {
+        foreach (explode(',', $include_parameter) as $include) {
+          try {
+            $includes = IncludedData::merge($includes, $this->includeResolver->resolve($entity, $include));
+          }
+          catch (BadRequestHttpException $exception) {
+            continue;
+          }
+        }
+      }
+    }
+    return IncludedData::deduplicate($includes);
   }
 
 }