diff --git a/caffe2fluid/doc/Crop.md b/caffe2fluid/doc/Crop.md
index 3ecb170bb99dfe85b30a1f956f3448b39ed7bd40..b365e93867d8bdff7f2ea32fd9a8c41dfeb581a4 100644
--- a/caffe2fluid/doc/Crop.md
+++ b/caffe2fluid/doc/Crop.md
@@ -22,9 +22,9 @@ layer {
 ```python
 paddle.fluid.layers.crop(
     x, 
-    shape=None, 
-    offsets=None, 
-    name=None
+    shape = None, 
+    offsets = None, 
+    name = None
 )
 ```