diff --git a/doc/fluid/dev/index_en.rst b/doc/fluid/dev/index_en.rst
index 98988fc22dcedecdbcd67fb3bf761377bf046337..80c899a82fa452c5cd8f38dad89c15d3041b09e3 100644
--- a/doc/fluid/dev/index_en.rst
+++ b/doc/fluid/dev/index_en.rst
@@ -4,6 +4,7 @@ Development
 .. toctree::
   :maxdepth: 1
 
+  api_doc_std_en.md
   new_op_en.md
   new_op_kernel.md
   use_eigen_en.md