diff --git a/docs/kittens/custom.rst b/docs/kittens/custom.rst
index 19c4f79c5..7e4e1aeae 100644
--- a/docs/kittens/custom.rst
+++ b/docs/kittens/custom.rst
@@ -135,7 +135,15 @@ Debugging kittens
 --------------------
 
 The part of the kitten that runs in ``main()`` is just a normal programs and
-the output of print statements will be visible in the kitten window.
+the output of print statements will be visible in the kitten window. Or
+alternately, you can use::
+
+    from kittens.tui.loop import debug
+    debug('whatever')
+
+The ``debug()`` function is just like ``print()`` except that the output
+will appear in the stdout of the kitty process inside which the kitten is
+running.
 
 The ``handle_result()`` part of the kitten runs inside the kitty process.
 The output of print statements will go to the ``STDOUT`` of the kitty process.