diff --git a/src/spikeinterface/extractors/neoextractors/tdt.py b/src/spikeinterface/extractors/neoextractors/tdt.py
index a95154a37d..a0d383ed1f 100644
--- a/src/spikeinterface/extractors/neoextractors/tdt.py
+++ b/src/spikeinterface/extractors/neoextractors/tdt.py
@@ -15,7 +15,7 @@ class TdtRecordingExtractor(NeoBaseRecordingExtractor):
     ----------
     folder_path: str
         The folder path to the tdt folder.
-    stream_id: str, default: None
+    stream_id: str or None, default: None
         If there are several streams, specify the stream id you want to load.
     stream_name: str, default: None
         If there are several streams, specify the stream name you want to load.