diff --git a/sw/decoders/utility.py b/sw/decoders/utility.py
index 487aec5..fe53519 100644
--- a/sw/decoders/utility.py
+++ b/sw/decoders/utility.py
@@ -76,7 +76,7 @@ def test_decoder(decoder: typing.Any,
 
             # TODO: Is this a valid simulation? Can we just add AWGN to the codeword, ignoring and modulation and (
             #  e.g. matched) filtering?
-            y = add_awgn(x, SNR, signal_amp=(1 / np.sqrt(2)))
+            y = add_awgn(x, SNR, signal_amp=np.sqrt(2))
             y_hat = decoder.decode(y)
 
             total_bit_errors += count_bit_errors(c, y_hat)