diff --git a/pytato/transform.py b/pytato/transform.py
index 79ba5c91c149ed20798cf8dd680be2fe111537b4..7c37be58b37625cc1c3d4b78ae0a4ade847a6ec1 100644
--- a/pytato/transform.py
+++ b/pytato/transform.py
@@ -49,6 +49,7 @@ __doc__ = """
 .. autoclass:: SubsetDependencyMapper
 .. autoclass:: WalkMapper
 .. autoclass:: CachedWalkMapper
+.. autoclass:: TopoSortMapper
 .. autofunction:: copy_dict_of_named_arrays
 .. autofunction:: get_dependencies
 
@@ -529,6 +530,7 @@ class WalkMapper(Mapper):
 # }}}
 
 
+# {{{ CachedWalkMapper
 # {{{ CachedWalkMapper
 
 class CachedWalkMapper(WalkMapper):