diff --git a/python/paddle/fluid/async_executor.py b/python/paddle/fluid/async_executor.py
index 2664a7301db3bf471126ff26504e7042f02b7d84..0d007001a4a210118d09dc92c6e648e0e542cef7 100644
--- a/python/paddle/fluid/async_executor.py
+++ b/python/paddle/fluid/async_executor.py
@@ -64,7 +64,7 @@ class AsyncExecutor(object):
 
     Args:
         place(fluid.CPUPlace|None): indicate the executor run on which device.
-                                   Only CPUPlace supported
+                                    Only CPUPlace supported
 
     Note:
         For debugging complicated network in parallel-GPUs, you can test it