diff --git a/python/paddle/v2/reader/__init__.py b/python/paddle/v2/reader/__init__.py
index 3b059735a924d58714cd88a761eb83143f1192d6..12efdc4a0fec83fed57bdcbf687aaec69d13ba91 100644
--- a/python/paddle/v2/reader/__init__.py
+++ b/python/paddle/v2/reader/__init__.py
@@ -50,7 +50,7 @@ An example implementation for single item data reader creator:
         def reader():
             while True:
                 yield numpy.random.uniform(-1, 1, size=width*height)
-    return reader
+        return reader
 
 An example implementation for multiple item data reader creator:
 
@@ -60,7 +60,7 @@ An example implementation for multiple item data reader creator:
         def reader():
             while True:
                 yield numpy.random.uniform(-1, 1, size=width*height), label
-    return reader
+        return reader
 
 
 TODO(yuyang18): Should we add whole design doc here?