diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76d8a8be9..226b5882b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ### Fixes
 
 * The `sonpy` package for the Spike2 interface no longer attempts installation on M1 Macs. [PR #563](https://github.com/catalystneuro/neuroconv/pull/563)
+* Fixed `subset_sorting` to explicitly cast `end_frame` to int to avoid SpikeInterface frame slicing edge case. [PR #565](https://github.com/catalystneuro/neuroconv/pull/565)
 
 
 
diff --git a/src/neuroconv/datainterfaces/ecephys/basesortingextractorinterface.py b/src/neuroconv/datainterfaces/ecephys/basesortingextractorinterface.py
index 4a3a32e68..abe2f8928 100644
--- a/src/neuroconv/datainterfaces/ecephys/basesortingextractorinterface.py
+++ b/src/neuroconv/datainterfaces/ecephys/basesortingextractorinterface.py
@@ -222,7 +222,7 @@ def subset_sorting(self):
                 if any(x)
             ]
         )
-        end_frame = 1.1 * max_min_spike_time
+        end_frame = int(1.1 * max_min_spike_time)
         if self.sorting_extractor.has_recording():
             end_frame = min(end_frame, self.sorting_extractor._recording.get_total_samples())
         stub_sorting_extractor = self.sorting_extractor.frame_slice(start_frame=0, end_frame=end_frame)