diff --git a/doc/fluid/api/gen_index.py b/doc/fluid/api/gen_index.py
index 363aea2aa3baf1d398d1f2cae10704717ab5e770..e6b86270964aec33bf1c546a52afeee1d81a4dc1 100644
--- a/doc/fluid/api/gen_index.py
+++ b/doc/fluid/api/gen_index.py
@@ -4,7 +4,7 @@ import glob
 import os
 if __name__ == '__main__':
     
-    file_object = open('index.rst', 'w')
+    file_object = open('index_en.rst', 'w')
     file_object.write('''=============
 API Reference
 =============