diff --git a/src/spikeinterface/curation/auto_merge.py b/src/spikeinterface/curation/auto_merge.py
index 89c24565c2..4f4cff144e 100644
--- a/src/spikeinterface/curation/auto_merge.py
+++ b/src/spikeinterface/curation/auto_merge.py
@@ -231,7 +231,7 @@ def compute_merge_unit_groups(
         params = _default_step_params.get(step).copy()
         if steps_params is not None and step in steps_params:
             params.update(steps_params[step])
-    
+
         # STEP : remove units with too few spikes
         if step == "num_spikes":