diff --git a/src/documents/serialisers.py b/src/documents/serialisers.py
index 3fce749904..e5f73dd5d7 100644
--- a/src/documents/serialisers.py
+++ b/src/documents/serialisers.py
@@ -1792,7 +1792,7 @@ class RemovePasswordDocumentsSerializer(
 
 
 class DeleteDocumentsSerializer(DocumentSelectionSerializer):
-    pass
+    from_webui = serializers.BooleanField(required=False, default=False)
 
 
 class ReprocessDocumentsSerializer(DocumentSelectionSerializer):