diff --git a/docs/source/trait_types.rst b/docs/source/trait_types.rst
index 3c67003f..1b293443 100644
--- a/docs/source/trait_types.rst
+++ b/docs/source/trait_types.rst
@@ -110,5 +110,7 @@ Miscellaneous
 .. autoclass:: Union
    :members: __init__
 
+.. autoclass:: Callable
+
 .. autoclass:: Any