diff --git a/utensor_cgen/backend/operators.py b/utensor_cgen/backend/operators.py
index 9a4ea0ef..3c625177 100644
--- a/utensor_cgen/backend/operators.py
+++ b/utensor_cgen/backend/operators.py
@@ -492,7 +492,7 @@ def __init__(self, op_info, **kwargs):
                                      in_dtype=in_dtype, filter_dtype=filter_dtype, out_dtype=out_dtype,
                                      ref_count=ref_count, to_eval=to_eval)
 
-@OperatorFactory.registder
+@OperatorFactory.register
 class _Conv2DQuantOperator(_Operator):
 
   op_type = "QuantizedConv2D"