diff --git a/Documentation/driver-api/serial/index.rst b/Documentation/driver-api/serial/index.rst
index 4ebdb86cd6b6..03a55b987a1d 100644
--- a/Documentation/driver-api/serial/index.rst
+++ b/Documentation/driver-api/serial/index.rst
@@ -16,7 +16,6 @@ Serial drivers
 .. toctree::
     :maxdepth: 1
 
-    moxa-smartio
     serial-iso7816
     serial-rs485
 
diff --git a/Documentation/driver-api/tty/index.rst b/Documentation/driver-api/tty/index.rst
index 85eaac76a971..2d32606a4278 100644
--- a/Documentation/driver-api/tty/index.rst
+++ b/Documentation/driver-api/tty/index.rst
@@ -68,5 +68,6 @@ Miscellaneous documentation can be further found in these documents:
 .. toctree::
    :maxdepth: 2
 
+   moxa-smartio
    n_gsm
    n_tty
diff --git a/Documentation/driver-api/serial/moxa-smartio.rst b/Documentation/driver-api/tty/moxa-smartio.rst
similarity index 100%
rename from Documentation/driver-api/serial/moxa-smartio.rst
rename to Documentation/driver-api/tty/moxa-smartio.rst