diff --git a/Doc/source/index.rst b/Doc/source/index.rst
index 2f37397e2..7db52a3d0 100644
--- a/Doc/source/index.rst
+++ b/Doc/source/index.rst
@@ -330,7 +330,7 @@ Table of Contents
    mtiLib
    otlLib/index
    pens/index
-   subset
+   subset/index
    svgLib/index
    t1Lib
    ttLib/index
diff --git a/Doc/source/subset/cff.rst b/Doc/source/subset/cff.rst
new file mode 100644
index 000000000..8c21c3966
--- /dev/null
+++ b/Doc/source/subset/cff.rst
@@ -0,0 +1,8 @@
+###
+cff
+###
+
+.. automodule:: fontTools.subset.cff
+   :inherited-members:
+   :members:
+   :undoc-members:
diff --git a/Doc/source/subset.rst b/Doc/source/subset/index.rst
similarity index 74%
rename from Doc/source/subset.rst
rename to Doc/source/subset/index.rst
index 9416422fa..f32e0d42c 100644
--- a/Doc/source/subset.rst
+++ b/Doc/source/subset/index.rst
@@ -2,6 +2,11 @@
 subset
 ######
 
+.. toctree::
+   :maxdepth: 1
+
+   cff
+
 .. automodule:: fontTools.subset
    :inherited-members:
    :members: