diff --git a/doc/array.rst b/doc/array.rst
index a31fb2e53caf988d3eddf76cb3a30edd4879baef..56772affa662eb1e95c4ee78062bc69aaa71d431 100644
--- a/doc/array.rst
+++ b/doc/array.rst
@@ -5,12 +5,17 @@ Array Expressions
 
 .. automodule:: pytato.array
 
+Functions in Pytato IR
+----------------------
+
+.. automodule:: pytato.function
 
 Raising :class:`~pytato.array.IndexLambda` nodes
 ------------------------------------------------
 
 .. automodule:: pytato.raising
 
+
 Calling :mod:`loopy` kernels in an array expression
 ---------------------------------------------------