diff --git a/doc/develop/bootstd/index.rst b/doc/develop/bootstd/index.rst
index 69fd3c2..2c5d2d3 100644
--- a/doc/develop/bootstd/index.rst
+++ b/doc/develop/bootstd/index.rst
@@ -11,3 +11,4 @@
    pxelinux
    qfw
    cros
+   sandbox