diff --git a/pyqtorch/noise/readout.py b/pyqtorch/noise/readout.py
index 1c559408..5e559478 100644
--- a/pyqtorch/noise/readout.py
+++ b/pyqtorch/noise/readout.py
@@ -105,7 +105,7 @@ def bs_bitflip_corruption(
     given a noise matrix.
 
     Args:
-        err_idx (Tensor): A Boolean array of bit string indices that need to be corrupted.
+        err_idx (Tensor): A Boolean array of bit string indices to be corrupted.
         sample (Tensor): A torch.Tensor of bit strings n_shots x n_qubits.
 
     Returns: