diff --git a/src/spikeinterface/core/baserecording.py b/src/spikeinterface/core/baserecording.py
index 7c43f16c83..734135368b 100644
--- a/src/spikeinterface/core/baserecording.py
+++ b/src/spikeinterface/core/baserecording.py
@@ -869,8 +869,10 @@ def time_to_sample_index(self, time_s):
                 sample_index = time_s * self.sampling_frequency
             else:
                 sample_index = (time_s - self.t_start) * self.sampling_frequency
+            sample_index = round(sample_index)
         else:
             sample_index = np.searchsorted(self.time_vector, time_s, side="right") - 1
+
         return int(sample_index)
 
     def get_num_samples(self) -> int: