diff --git a/README.org b/README.org
index 47b1eb3..d161b28 100644
--- a/README.org
+++ b/README.org
@@ -18,7 +18,9 @@ Currently, the toolkit includes the following files:
 
   - [[file:generic.rkt][generic.rkt]]: The generic interface for a discrete dynamical
     system, with functions for constructing state graphs.
-  - [[file:utils.rkt][utils.rkt]]: Misc utility functions.
+  - [[file:utils.rkt][utils.rkt]]: Misc utilities.
+  - [[file:functions.rkt][functions.rkt]]: Definitions for working with functions: tabulating,
+    constructing from tables, generating random functions, etc.
   - [[file:networks.rkt][networks.rkt]]: Implements network-based models, which generalise
     Boolean networks, threshold Boolean automata networks, multivalued
     networks, etc.