diff --git a/src/spikeinterface/sorters/external/kilosortbase.py b/src/spikeinterface/sorters/external/kilosortbase.py
index 2b8eb621b9..67ddb52ab4 100644
--- a/src/spikeinterface/sorters/external/kilosortbase.py
+++ b/src/spikeinterface/sorters/external/kilosortbase.py
@@ -218,7 +218,7 @@ def _run_from_folder(cls, sorter_output_folder, params, verbose):
         if params["delete_recording_dat"] and (recording_file := sorter_output_folder / "recording.dat").exists():
             recording_file.unlink()
 
-        all_temp_files = ("matlab_files", "temp_wh.dat")
+        all_tmp_files = ("matlab_files", "temp_wh.dat")
 
         if isinstance(params["delete_tmp_files"], bool):
             if params["delete_tmp_files"]: