diff --git a/doc/fluid/api/gen_doc.py b/doc/fluid/api/gen_doc.py
index ec8c6cc16ae1c5e16a338c6df29b3e9532c83312..638f6c338eb3d869f572234ef463b624a13e0471 100644
--- a/doc/fluid/api/gen_doc.py
+++ b/doc/fluid/api/gen_doc.py
@@ -83,7 +83,8 @@ class DocGenerator(object):
         else:
             self.stream.close()
             path = os.getcwd()+"/fluid/"+name+".rst"
-            os.remove(path)
+            if name != "PipeReader":
+                os.remove(path)
 
     def print_class(self, name):
         self._print_ref_(name)