diff --git a/src/sdk/pynni/nni/compression/torch/builtin_quantizers.py b/src/sdk/pynni/nni/compression/torch/builtin_quantizers.py
index <HASH>..<HASH> 100644
--- a/src/sdk/pynni/nni/compression/torch/builtin_quantizers.py
+++ b/src/sdk/pynni/nni/compression/torch/builtin_quantizers.py
@@ -5,7 +5,7 @@ import logging
 import torch
 from .compressor import Quantizer, QuantGrad, QuantType
 
-__all__ = ['NaiveQuantizer', 'QAT_Quantizer', 'DoReFaQuantizer']
+__all__ = ['NaiveQuantizer', 'QAT_Quantizer', 'DoReFaQuantizer', 'BNNQuantizer']
 
 logger = logging.getLogger(__name__)
export for default (#<I>)