diff --git a/user_guide_src/source/incoming/controllers.rst b/user_guide_src/source/incoming/controllers.rst
index 21c717d9eace..5ade052c563a 100644
--- a/user_guide_src/source/incoming/controllers.rst
+++ b/user_guide_src/source/incoming/controllers.rst
@@ -307,6 +307,11 @@ Example:
 
 .. literalinclude:: controllers/012.php
 
+Extending the Controller
+************************
+
+If you want to extend the controller, see :doc:`../extending/basecontroller`.
+
 That's it!
 **********