src/JsonApiResource/JsonApiDocumentTopLevel.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/JsonApiResource/JsonApiDocumentTopLevel.php b/src/JsonApiResource/JsonApiDocumentTopLevel.php
index e4470ea..cd0882f 100644
--- a/src/JsonApiResource/JsonApiDocumentTopLevel.php
+++ b/src/JsonApiResource/JsonApiDocumentTopLevel.php
@@ -2,6 +2,8 @@
 
 namespace Drupal\jsonapi\JsonApiResource;
 
+use Drupal\Core\Field\EntityReferenceFieldItemListInterface;
+
 /**
  * Represents a JSON:API document's "top level".
  *