diff --git a/src/spikeinterface/comparison/paircomparisons.py b/src/spikeinterface/comparison/paircomparisons.py
index 248af3d7e0..fa5ec2d3d0 100644
--- a/src/spikeinterface/comparison/paircomparisons.py
+++ b/src/spikeinterface/comparison/paircomparisons.py
@@ -455,7 +455,7 @@ def print_summary(self, well_detected_score=None, redundant_score=None, overmerg
         d = dict(
             num_gt=len(self.unit1_ids),
             num_tested=len(self.unit2_ids),
-            num_well_detected=self.count_well_detected_units(well_detected_score)
+            num_well_detected=self.count_well_detected_units(well_detected_score),
         )
 
         if self.exhaustive_gt: