diff --git a/docs/source/util.rst b/docs/source/util.rst
index 188cda02c..ae5ec8eeb 100644
--- a/docs/source/util.rst
+++ b/docs/source/util.rst
@@ -5,6 +5,7 @@ Utilities
    :maxdepth: 2
 
    util/array
+   util/combinatorics
    util/common_messages
    util/notebooks
    util/numba
diff --git a/docs/source/util/combinatorics.rst b/docs/source/util/combinatorics.rst
new file mode 100644
index 000000000..9af1af055
--- /dev/null
+++ b/docs/source/util/combinatorics.rst
@@ -0,0 +1,7 @@
+combinatorics
+=============
+
+.. automodule:: quantecon.util.combinatorics
+    :members:
+    :undoc-members:
+    :show-inheritance: