diff --git a/doc/howto/dev/new_op_en.md b/doc/howto/dev/new_op_en.md
index afd3775ede6a1b6865cd3b2cf3b08c4dcc00d07e..b7aa501db9e5c7378398fad48503f82bff893b60 100644
--- a/doc/howto/dev/new_op_en.md
+++ b/doc/howto/dev/new_op_en.md
@@ -232,4 +232,4 @@ The system will automatically bind to Python and link it to a generated library.
 
 ## Unit Tests
 
-Unit tests include comparing a forward operator's implementations on different devices, comparing a backward operator's implementation on different devices, and a scaling test for the backward operator. Here, we introduce the [unit tests for `MulOp`](https://github.com/PaddlePaddle/Paddle/blob/develop/python/paddle/v2/framework/tests/test_mul_op.py).
\ No newline at end of file
+Unit tests include comparing a forward operator's implementations on different devices, comparing a backward operator's implementation on different devices, and a scaling test for the backward operator. Here, we introduce the [unit tests for `MulOp`](https://github.com/PaddlePaddle/Paddle/blob/develop/python/paddle/v2/framework/tests/test_mul_op.py).