diff --git a/mayan/apps/documents/api_views.py b/mayan/apps/documents/api_views.py
index 5ee56464a4..a010aba7a6 100644
--- a/mayan/apps/documents/api_views.py
+++ b/mayan/apps/documents/api_views.py
@@ -378,7 +378,7 @@ class APIDocumentPageImageView(generics.RetrieveAPIView):
 
         task = task_generate_document_page_image.apply_async(
             kwargs=dict(
-                document_page_id=self.kwargs['page_pk'], size=size, zoom=zoom,
+                document_page_id=self.get_object().pk, size=size, zoom=zoom,
                 rotation=rotation
             )
         )