diff --git a/python/paddle/nn/functional/loss.py b/python/paddle/nn/functional/loss.py
index 1450101206244a1009db96b1e020f2319022c70c..c67f578df22f72292adb9dcc5ee62a31a063f72b 100755
--- a/python/paddle/nn/functional/loss.py
+++ b/python/paddle/nn/functional/loss.py
@@ -1807,7 +1807,7 @@ def cross_entropy(input,
             valid_label = paddle.where(label == ignore_index,
                                        paddle.zeros_like(label), label)
             ignore_weight_mask = paddle.cast(
-				(label != ignore_index), input.dtype)
+                (label != ignore_index), input.dtype)
             if ignore_weight_mask.ndim > 1 and ignore_weight_mask.shape[
                     -1] == 1:
                 ignore_weight_mask = paddle.squeeze(ignore_weight_mask, -1)