diff --git a/doc/index.rst b/doc/index.rst
index 24e1d66373b8112d03b8ae9bc8ff343e50622ce8..1088516f820e07ea09eef446ea53e00e883ab0fb 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -9,6 +9,7 @@ Welcome to pytools's documentation!
     obj_array
     persistent_dict
     graph
+    tag
     codegen
     misc