diff --git a/torch/onnx/__init__.py b/torch/onnx/__init__.py
index eb081ddf733..00e288bf4b0 100644
--- a/torch/onnx/__init__.py
+++ b/torch/onnx/__init__.py
@@ -186,7 +186,7 @@ def export(model, args, f, export_params=True, verbose=False, training=TrainingM
         opset_version (int, default 9): The version of the
             `default (ai.onnx) opset <https://github.com/onnx/onnx/blob/master/docs/Operators.md>`_
             to target. Must be >= 7 and <= 15.
-        do_constant_folding (bool, default False): Apply the constant-folding optimization.
+        do_constant_folding (bool, default True): Apply the constant-folding optimization.
             Constant-folding will replace some of the ops that have all constant inputs
             with pre-computed constant nodes.
         dynamic_axes (dict<string, dict<int, string>> or dict<string, list(int)>, default empty dict):