diff --git a/doc/fluid/api_cn/layers_cn/gather_cn.rst b/doc/fluid/api_cn/layers_cn/gather_cn.rst
index 269a56a9b2ff031730eefd4fff51f51267bd5d71..9f213831c830179963e3da868c67ff413602f40a 100644
--- a/doc/fluid/api_cn/layers_cn/gather_cn.rst
+++ b/doc/fluid/api_cn/layers_cn/gather_cn.rst
@@ -45,7 +45,7 @@ gather
   
   import paddle.fluid as fluid
   x = fluid.layers.data(name='x', shape=[-1, 5], dtype='float32')
-  index = fluid.layers.data(name='index', shape=[-1, 1], dtype='int32')
+  index = fluid.layers.data(name='index', shape=[1], dtype='int32')
   output = fluid.layers.gather(x, index)