diff --git a/nn_fingerprint.py b/nn_fingerprint.py
index 27925f3..8c1c5c3 100644
--- a/nn_fingerprint.py
+++ b/nn_fingerprint.py
@@ -120,7 +120,7 @@ class NNFingerprint(NNOperator):
                 audio = numpy.hstack(frames)
                 if len(audio.shape) == 1:
                     audio = audio[None, :]
-            audio = self.int2float(audio, dtype='float32')
+            audio = self.int2float(audio)
             audio = torch.from_numpy(audio)
         assert len(audio.shape) == 2